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A nomogram for relapse/death and contemplating adjuvant therapy for parathyroid carcinoma
(Elsevier, 2023-08) Silva-Figueroa, Angélica
The staging systems proposed to date for PC have not been adequately validated. Recent multivariate have been carried out in large national and international databases to search for prognostic factors for survival and relapse in PC. Advanced age, male gender, high PTH and calcium levels at diagnosis, tumor size >30 mm, angioinvasion, presence of distant metastases, and specific tumor microenvironmental factors, such as parafibromin staining and tumor-infiltrating lymphocytes, have been strongly correlated with decreased OS and CSS, and with increased risk of local and distant recurrence. Because of their prognostic significance, these host and tumor factors should be included in any PC staging system. However, there is a need to promote collaborative PC registry plans to collate data on the above prognostic factors as well as new ways in a standardized global registry. Such a resource could be used to stratify patients with PC and identify those at high risk for relapse and death who may benefit from strict surveillance or adjuvant therapeutic care. PC is an indolent cancer with a high recurrence rate of 3 to 5 years after the first surgical intervention. Progression can remain dormant for decades until patients present with distant metastases. Such heterogeneity and neoplastic latency make OS an ambitious endpoint to achieve, and pursuing OS contradicts the actual needs of patients with this endocrine neoplasm. More relevant endpoints focus on achieving normal blood biochemistry to improve quality of life and intervening to lengthen recurrence/metastasis event-related-free survival. Surgery remains the standard treatment because traditional therapies, such as EBRT and chemotherapy, do not benefit patients with advanced unresectable or metastatic PC, new options are emerging for patients with PC. Genomic and phenotypic profiling can continue to inform personalized therapeutic strategies to expand the clinical options available to patients with PC.
The Akin osteotomy without fixation in open hallux abducto-valgo correction surgery: A single center retrospective analysis of 286 cases
(Elsevier, 2023-01-06) Testa, Enrique Adrián; Porreca, Annamaria; Ruiz Nasarre, Alberto; Poggio Cano, Daniel; Alvarez Goenaga, Fernando; Ledermann, Gerardo; Baduell, Albert; Ruiz Riquelme, Pablo
Between 2011 and 2018, 222 patients, 286 feet (147 left, 139 right) met the inclusion criteria. We found an average difference between pre-op and post-op at 3 months of distal articular set angle (DASA) of 7.0 degrees and average interphalangeal joint obliquity angle (IPOA) of 12.0 degrees (p < 0.001). All cases achieved fusion but in 5.9 % (17/289 cases) of cases, we observed delayed consolidation. The average union time in these cases was 22.1 weeks. Hyperextension of the distal fragment (mal union in plantar flexion) was observed in 7 cases (2.4 %). None of the 7 cases required correction. Out of 286 surgeries, 8 (2.7 %) required reoperation, but only one case for a hypocorrection required Akin's re osteotomy. Regarding the inter- and intra-observer correlations, good and excellent reliability are observed for all parameters under consideration. Conclusion The absence of internal fixation would appear not to impair osteotomy healing and complication rates compared with techniques with fixation would not appear to be worse. The results are encouraging; nevertheless, we believe that further studies need to be performed in order to confirm the data.
Analysis of predictors for spinal fusion in degenerative lumbar stenosis in Chile based on diagnosis-related groups
(Gavin Publishers, 2024-01-03) Molina, Marcelo; Salvo, Lorena; Arriola, Constanza; Rioseco, Bernardita
Introduction: Degenerative Lumbar spinal stenosis (DLSS) is the most common cause of spine surgery for patients above 55 years. Surgery options include decompression alone or with spinal fusion. The DRG system uses classification algorithms that categorize patients into groups with similar clinical and resource consumption characteristics, using ICD-10 nomenclature for diagnoses and ICD-9-CM for procedures. Objective: Identify clinical and epidemiological variables of DLSS surgery patients based on Chile’s DRG system data and define factors associated with arthrodesis as a complement to decompression. Study Design: Retrospective observational study. Methods: This study used the national DRG database to analyze factors predicting the need for fusion in patients with DLSS. Data from 31 public hospitals in Chile were analyzed for patients discharged between 2020 and 2022. Variables considered included age, gender, presence of other spinal pathologies, and attending physician specialty. For the descriptive analysis of qualitative variables, frequencies and percentages were used.The study used univariate and multivariate logistic regression analysis. A statistical significance level of less than 0.05 was considered. Results: We analyzed 1024 patients with lumbar spinal stenosis and found that 54.6% were female and 45.4% were male (p= 0.0034). The majority of the patients (57.4%) were aged between 60 and 79 years. 75% of orthopedic surgeons opted for decompression plus arthrodesis, while neurosurgeons preferred decompression alone in 73% of cases. The most significant predictors for decompression with fusion were the physician’s specialty in orthopedic surgery, female sex, and the presence of other spinal pathologies such as scoliosis, herniated disc, and spondylolisthesis. Patients treated by an Orthopedic Surgeon had an 8.2 times greater probability of undergoing decompression plus arthrodesis as compared to those treated by a Neurosurgeon. Additionally, the presence of spondylolisthesis increased the probability of decompression with fusion by 6.2 times, and the presence of scoliosis increased it by 6.6 times. Neurosurgeons opted for decompression alone in 89.7% of the cases with DLSS stenosis and herniated disc, while only 48.9% of orthopedic surgeons opted for the same option (p=0.0000). Conclusion: Our study based on DRG records from public hospitals in Chile has identified certain factors linked to a higher frequency of spinal arthrodesis. These factors include the surgery being performed by orthopedic surgeons, patients aged between 40 and 60 years old, the presence of degenerative spondylolisthesis and degenerative scoliosis, and the absence of a herniated disc.
Anatomical variants of the origin of the coronary arteries: a systematic review and meta-analysis of prevalence
(MDPI, 2024-06-24) Valenzuela Fuenzalida, Juan José; Becerra Rodriguez, Emelyn; Quivira Muñoz, Alonso; Baez Flores, Belén; Escalona Manzo , Catalina; Orellana-Donoso, Mathias; Nova Baeza, Pablo; Suazo Santibañez, Alejandra; Bruna Mejias, Alejandro; Sanchis Gimeno, Juan; Gutiérrez Espinoza, Héctor; Granite, Guinivere
Purpose: The most common anomaly is an anomalous left coronary artery originating from the pulmonary artery. These variants can be different and depend on the location as well as how they present themselves in their anatomical distribution and their symptomatological relationship. For these reasons, this review aims to identify the variants of the coronary artery and how they are associated with different clinical conditions. Methods: The databases Medline, Scopus, Web of Science, Google Scholar, CINAHL, and LILACS were researched until January 2024. Two authors independently performed the search, study selection, and data extraction. Methodological quality was evaluated using an assurance tool for anatomical studies (AQUA). Pooled prevalence was estimated using a random effects model. Results: A total of 39 studies met the established selection criteria. In this study, 21 articles with a total of 578,868 subjects were included in the meta-analysis. The coronary artery origin variant was 1% (CI = 0.8-1.2%). For this third sample, the funnel plot graph showed an important asymmetry, with a p-value of 0.162, which is directly associated with this asymmetry. Conclusions: It is recommended that patients whose diagnosis was made incidentally and in the absence of symptoms undergo periodic controls to prevent future complications, including death. Finally, we believe that further studies could improve the anatomical, embryological, and physiological understanding of this variant in the heart.
Anatomical variants of the renal veins and their relationship with morphofunctional alterations of the kidney: a systematic review and meta-analysis of prevalence
(MDPI, 2024-04-21) Valenzuela Fuenzalida, Juan José; Vera Tapia, Karla; Urzúa Márquez, Camila; Yáñez Castillo, Javiera; Trujillo Riveros, Martín; Koscina, Zmilovan; Orellana-Donoso, Mathias; Suazo-Santibañez, Alejandra; Sanchis Gimeno, Juan; Bruna Mejias, Alejandro; Gutiérrez Espinoza, Héctor
Background: Variations in renal veins are quite common, and most people do not experience issues due to them. However, these variations are important for healthcare professionals, especially in surgical procedures and imaging studies, as precise knowledge of vascular anatomy is essential to avoid complications during medical interventions. The purpose of this study was to expose the frequency of anatomical variations in the renal vein (RV) and detail their relationship with the retroperitoneal and renal regions. Methods: A systematic search was conducted in the Medline, Scopus, Web of Science, Google Scholar, CINAHL, and LILACS databases from their inception until January 2024. Two authors independently carried out the search, study selection, and data extraction and assessed methodological quality using a quality assurance tool for anatomical studies (AQUA). Ultimately, consolidated prevalence was estimated using a random effects model. Results: In total, 91 studies meeting the eligibility criteria were identified. This study included 91 investigations with a total of 46,664 subjects; the meta-analysis encompassed 64 studies. The overall prevalence of multiple renal veins was 5%, with a confidence interval (CI) of 4% to 5%. The prevalence of the renal vein trajectory was 5%, with a CI of 4% to 5%. The prevalence of renal vein branching was 3%, with a CI of 0% to 6%. Lastly, the prevalence of unusual renal vein origin was 2%, with a CI of 1% to 4%. Conclusions: The analysis of these variants is crucial for both surgical clinical management and the treatment of patients with renal transplant and hemodialysis.
Anatomical variations and abnormalities of the maxillary region and clinical implications: A systematic review and metaanalysis
(Wolters Kluwer Health, 2023-07-05) Valenzuela-Fuenzalida, Juan José; Baez-Flores, Belén; Ávila-Sepúlveda, Roberto; Moya-Medina, Claudia; Pérez-Jiménez, Rubén; López, Esteban; Sánchis, Juan; Orellana-Donoso, Mathias; Leyton-Silva, Javiera; Rodríguez, Macarena-Cecilia; Iwanaga, Joe
Objetivo: El objetivo de esta revisión es investigar y analizar las variaciones anatómicas presentes en el seno maxilar (SM), a través de la examinación de la prevalencia de estas variaciones, así como la correspondiente prevalencia de patologías clínicamente significativas y complicaciones asociadas a ellas. Métodos: El proceso de búsqueda se realizó en las siguientes bases de datos; MEDLINE, SCIELO, WOS, CINHAL, SCOPUS y GOOGLE SCHOLAR, utilizando como términos de búsqueda; “Hueso maxilar”, “Seno maxilar”, “Seno paranasal”, “Variaciones anatómicas”, “Sinusitis” y “Anatomía clínica”. Resultados: Se incluyeron un total de 26 artículos y 12969 muestras, de las cuales se registró el sexo de 12,594 sujetos, dando un total de 5802 hombres y 6792 mujeres. Las variantes reportadas por los incluidos fueron células de Haller, Concha Bullosa, Número de septos, Seno hipoplásico, Agger Nasi, Engrosamiento de la mucosa MS, Desviación del tabique nasal, Ostium accesorio y Células de Onodi. Entre los mencionados, los que presentaron mayor número de estudios (entre 8 y 10 estudios incluidos) fueron: las Células de Haller, la Concha Bullosa y el Número de septos, donde la prevalencia fue de 0,30, 0,36, 0,39 respectivamente. Estas variaciones pueden provocar sinusitis, provocar algunos tipos de tumores o afectar estructuras vecinas que podrían verse comprometidas por esta variación. Conclusión: Como resultado, es ciertamente complejo distinguir la presencia de variaciones anatómicas de anomalías patológicas. Por tanto, el conocimiento de las diferentes variaciones y sus relaciones clínicas podría ser un activo útil para los médicos dedicados a esta región.
Anatomy of vertebral artery hypoplasia and its relationship with clinical implications: a systematic review and meta-analysis of prevalence
(Springer, 2024-05-19) Valenzuela Fuenzalida, Juan José; Rojas Navia, Constanza; Quirós Clavero, Amanda; Sanchis Gimeno, Juan; Rodriguez Luengo, Macarena; Nova Baeza, Pablo; Orellana-Donoso, Mathias; Becerra Farfán, Álvaro; Bruna Mejias, Alejandro; Sepúlveda Loyola, Walter; Iwanaga, Joe
Purpose: The vertebral artery (VA) is a vital branch of the subclavian artery, coursing through the transverse foramina of the cervical vertebrae, and playing a crucial role in irrigating the posterior region of the arterial cerebral circle, also known as the Polygon of Willis. Among the various possible alterations that can affect the VA, vertebral artery hypoplasia (HAV) emerges as a significant variant. This study aims to discern the anatomical features of HAV and its correlation with the clinical conditions of the posterior cerebral circulation. Methods: The databases Medline, Scopus, Web of Science, Google Scholar, CINAHL, and LILACS were searched until January 2024. Two authors independently performed the search, study selection, and data extraction. Methodological quality was evaluated with an assurance tool for anatomical studies (AQUA). Pooled prevalence was estimated using a random effects model. Results: A total of 24 studies met the established selection criteria, with a total of 8847 subjects. In this study, 6 articles were included for the meta-analysis with a total of subjects. The average prevalence of VAH reported in each study was 11% (95% CI 10-12%); the studies had a heterogeneity of 41% based on the funnel plot and a low risk of bias. Conclusion: The prevalence of VAH is low, but in the presence of this condition, the changes are mainly in diameter rather than morphological. If it is present, some clinical safeguards must be taken to avoid complications such as stroke.
Antidiabetic potential of extracts from Cylindropuntia imbricata (Haw.) F.M. Knuth, Opuntia engelmannii Salm-Dyck ex Engelm., Ibervillea sonorae (S. Wats.) Greene and Theobroma cacao L.
(Universidad Nacional Autónoma de México; Facultad de Estudios Superiores Zaragoza., 2024-07-30) De la Sota- Esparza, Gastaldo Emmanuel; Alvarado-Vásquez, Marco Antonio; Rivas-Morales, Catalina; Rocha-Estrada, Alejandra; Chávez-Reyes, Arturo; Ortíz-Martínez, David Mizael
Diabetes mellitus is a disease that affects more than 537 million people in the world without decreasing. When diabetes becomes complicated, it damages several organs until it causes death. The drugs in use to counteract the disease produce side effects; a circumstance that has led to research on plants with anti-diabetic properties. The objective of this study was to evaluate the antidiabetic potential of extracts obtained by maceration of the following parts of the plant: Cylindropuntia imbricata (Cactaceae) cladode and seed, Opuntia engelmannii (Cactaceae) cladode and seed, Ibervillea sonorae (Cucurbitaceae) root and Theobroma cacao (Malvaceae) seed mixed with solvents of different polarity (hexane, ethyl acetate, dichloromethane and methanol). A total of 24 extracts were obtained and subjected to the following analyses: 1) phytochemical screening to determine their composition, 2) toxicity in B16F10 cells using the alamar blue test, 3) antioxidant capacity through DPPH inhibition, and 4) in vitro evaluation to determine their antihyperglycemic capacity (inhibition of alpha-glucosidase). The results obtained from methanolic extracts with O. engelmannii and T. cacao seeds, as well as ethyl acetate extracts with T. cacao and C. imbricata seeds showed antioxidant and antihyperglycemic activity. No toxicity in B16F10 cells, and antidiabetic potential in vitro. La diabetes mellitus es una enfermedad que no decrece y afecta a más de 537 millones de personas en el mundo. La diabetes al complicarse daña varios órganos hasta causar la muerte. Los fármacos en uso para contrarrestar la enfermedad producen efectos secundarios; circunstancia que ha propiciado la investigación en plantas con propiedades antidiabéticas. El objetivo de este estudio fue evaluar el potencial antidiabético de los extractos obtenidos por maceración de las siguientes partes de la planta: del cladodio y semilla de Cylindropuntia imbricata (Cactaceae), del cladodio y semilla de Opuntia engelmannii (Cactaceae), de la raíz de Ibervillea sonorae (Cucurbitaceae) y de la semilla de Theobroma cacao (Malvaceae) mezcladas con solventes de diferente polaridad (hexano, acetato de etilo, diclorometano y metanol). Se obtuvieron un total de 24 extractos sometidos a los análisis: 1) de cribado fitoquímico para determinar su composición, 2) de toxicidad en células B16F10 mediante la prueba de azul alamar, 3) de capacidad antioxidante a través de la inhibición de DPPH, y 4) de evaluación in vitro para conocer su capacidad antihiperglucémica (inhibición de la alfa glucosidasa). Los resultados obtenidos, de los extractos metanólicos con las semillas de O. engelmannii y T. cacao, así como los de acetato de etilo con las semillas de T. cacao y C. imbricata mostraron una actividad antioxidante y antihiperglucémica. Sin toxicidad en las células B16F10, y con potencial antidiabético in vitro.
Aprendizajes sobre la vulneración a la infancia durante la pandemia COVID-19: enfermedad, evidencia y políticas públicas
(Sociedad Chilena de Pediatría, 2024-11-01) Díaz, Franco
La pandemia de COVID-19 ha tenido repercusiones significativas en niños, niñas y adolescentes (NNA), tanto por los efectos directos del virus como por las medidas de salud pública aplicadas. Presentamos un análisis de los aciertos y errores en la respuesta gerontocéntrica a la pandemia, que invisibilizó a los NNA del panorama global, de su salud y ciclo vital. Contraponiéndose con la discreta incidencia de COVID-19 pediátrico, múltiples guías se desarrollaron precipitadamente para terapia, afectando el enfrentamiento de otras enfermedades, por ejemplo, el soporte respiratorio no-invasivo y terapia inhalada. Las medidas de confinamiento y cierre de colegios tuvieron un impacto mínimo en la propagación del virus, desmitificando el rol de supercontagiantes, pero su mantención prolongada se basó en decisiones no respaldadas por evidencia, resultando en una importante pérdida educativa y trastornos psicosociales. La crisis de salud mental en NNA se ha agudizado, con un aumento rápido de depresión y trastornos alimentarios, especialmente en grupos socioeconómicamente vulnerables. Otros ámbitos de salud fueron alterados, como la interrupción de servicios sanitarios preventivos, chequeos rutinarios y vacunaciones, diagnósticos de enfermedades como cáncer y terapias de rehabi-litación. Además, se analiza críticamente la narrativa de los mandatos de uso de mascarillas y vacunas en NNA. En conclusión, reflexionamos sobre los aciertos y errores durante la pandemia en puntos críticos de la salud de NNA, con el fin de aprender y optimizar nuestra respuesta a situaciones futuras. Es imperativo adoptar medidas urgentes para identificar y mejorar en estas áreas, cuyos catastróficos efectos recién comenzamos a entender en NNA, y futuros adultos.
Asociación del nivel socioeconómico y educacional en los egresos por cáncer de mama en Chile durante los años 2001 al 2016
(Asociación Nacional Científica de Estudiantes de Medicina de Chile (ANACEM), 2021) Morales, C.; de la Fuente, M.; Araya, F.; Diaz, X.; Burgos, S.; Bravo, M.E.
Introducción El cáncer de mama constituye la primera causa de muerte en los cánceres en Chile según Globocan 2018. Dentro de los factores que explican esta alta mortalidad encontramos una baja tasa de detección y de realización de mamografías en los niveles socioeconómicos altos. Es por esto que comprender las causas de defunción y los factores que afectan en la mortalidad y letalidad por cáncer de mama en los últimos 17 años nos permitirá enfocar las políticas públicas de los próximos 50 años. Los objetivos generales de este trabajo fueron caracterizar los egresos hospitalarios en los pacientes por cáncer de mama según la edad, el sexo, la previsión, el nivel socioeconómico y educacional en Chile durante los años 2001 al 2016 y calcular la mortalidad y letalidad específica en estas mismas variables durante los años 2001 a 2016. El objetivo específico es asociar las variables socioeconómicas y educacionales, estimando los Odd’s ratios de las variables en los egresos hospitalarios por cáncer de mama en Chile durante los años 2001 al 2016. Materiales y Métodos: Estudio de cohorte longitudinal retrospectivo en 81,072 egresos hospitalarios y 20,220 defunciones obtenidas de la página DEIS MINSAL, años 2001 - 2016. Para el análisis univariado se efectuó una regresión de ajuste de tasas Praisweinstein según edad y sexo según modelo OMS de ajuste de tasas. Para las variables de tipo discreta se describieron mediante porcentajes y tasas y para las variables de tipo continua se utilizó mediana y desviación estándar. Se efectuó un test de smirnovkolmolgorov para determinar el tipo de distribución y de normalidad de las muestras. Para las variables de tipo dicotómica se utilizó un modelo de regresión logística binaria para describir estas variables y determinar la posible asociación entre el nivel socioeconómico y educacional de las pacientes diagnosticadas por cáncer de mama. Resultados: Murieron 1,88 veces más personas de nivel socioeconómico alto con un IC entre 1,83- 1,94 con respecto a la población de nivel socioeconómico bajo. En cambio, las personas con un mayor nivel educacional murieron 0,5 veces menos según la regresión realizada respecto al bajo nivel educacional con un IC entre 0,47- 0,52, pero a menor nivel educacional aumentó 20 veces la mortalidad, constituyendo una causa inversa. Respecto al sexo las mujeres murieron 2,08 veces más que los hombres. Para el nivel socioeconómico alto en relación al bajo un OR [1.88 (1.83 a 1,94)], p<0,0001], para el nivel educacional alto en relación al bajo fue a favor del mayor nivel educacional con OR [0,5 (0,47 - 0,52)] y en cuanto a la comparación de sexos un OR [1,04 (1,03-2,17), p=0,039]. Es decir, la diferencia entre mortalidad que hubo fue significativa para todos los intervalos tanto para sexo, nivel educacional como para nivel socioeconómico. Se encontró una constante de 0,013 de mortalidad basal, es decir, todos tienen 1,3% de riesgo de morir por cáncer de mama independiente del nivel socioeconómico, educacional y del sexo. Conclusión: Existen diferencias estadísticamente significativas respecto a la mortalidad entre los niveles socioeconómicos altos y bajos y también en nivel educacional, sin embargo, al realizar los métodos de regresión se obtuvo una mayor mortalidad y mayor riesgo de morir por cáncer de mama en los niveles socioeconómicos más altos asociados a, probablemente, la menor cantidad de tamizajes y realización de mamografías en este estrato. A partir del año 2008 se observó un incremento a los niveles originales observados al inicio del segundo milenio incrementando las diferencias existentes en los índices de desigualdad tanto por nivel educacional como por nivel socioeconómico incrementando en 20 veces respecto al nivel educacional, y 1.88 respecto al nivel socioeconómico.
Association between the Anatomical Location of Glioblastoma and Its Evaluation with Clinical Considerations: A Systematic Review and Meta-Analysis
(MDPI, 2024-05-07) Valenzuela Fuenzalida, Juan José; Moyano Valarezo, Laura; Silva Bravo, Vicente; Milos Brandenberg, Daniel; Orellana-Donoso, Mathias; Nova Baeza, Pablo; Suazo Santibáñez, Alejandra; Rodríguez Luengo, Macarena; Oyanedel Amaro, Gustavo; Sanchis Gimeno, Juan; Gutiérrez Espinoza, Héctor
Background: Glioblastoma is a primary malignant brain tumor; it is aggressive with a high degree of malignancy and unfavorable prognosis and is the most common type of malignant brain tumor. Glioblastomas can be located in the brain, cerebellum, brainstem, and spinal cord, originating from glial cells, particularly astrocytes. Methods: The databases MEDLINE, Scopus, Web of Science, Google Scholar, and CINAHL were researched up to January 2024. Two authors independently performed the search, study selection, and data extraction. Methodological quality was evaluated with an assurance tool for anatomical studies (AQUA). The statistical mean, standard deviation, and difference of means calculated with the Student's t-test for presence between hemispheres and presence in the frontal and temporal lobes were analyzed. Results: A total of 123 studies met the established selection criteria, with a total of 6224 patients. In relation to the mean, GBM between hemispheres had a mean of 33.36 (SD 58.00) in the right hemisphere and a mean of 34.70 (SD 65.07) in the left hemisphere, due to the difference in averages between hemispheres. There were no statistically significant differences, p = 0.35. For the comparison between the presence of GBM in the frontal lobe and the temporal lobe, there was a mean in the frontal lobe of 23.23 (SD 40.03), while in the temporal lobe, the mean was 22.05 (SD 43.50), and for the difference in means between the frontal lobe and the temporal lobe, there was no statistically significant difference for the presence of GBM, p = 0.178. Conclusions: We believe that before a treatment, it will always be correct to know where the GBM is located and how it behaves clinically, in order to generate correct conservative or surgical treatment guidelines for each patient. We believe that more detailed studies are also needed to show why GBM is associated more with some regions than others, despite the brain structure being homologous to other regions in which GMB occurs less frequently, which is why knowing its predominant presence in brain regions is very important.
Atypical presentation of COVID-19: chronic bilateral testicular pain with lower extremity peripheral polyneuropathy, case report
(Elsevier, 2022-01) Salazar, Aníbal; Gonzalez, Agustín; Murray, Nigel P.; Castro, Carlos
In context of COVID-19 pandemic, there has been different presentations of the infection. The relationship of testicular pain with COVID-19 has not been extensively studied. We present a 31 years old male, with SARS-COV-2 infection, repeatedly consulting for intermittent bilateral testicular pain. Two months later he reported acute loss sensibility and pain in extremities, being diagnosed with axonal fine fiber polyneuropathy. Although the presence of SARS-COV-2 in testis remains controversial, there is a potential orchiepididymitis risk due to viral binding to ACE2 receptor in testicle, and also could induce systemic vasculitis as another possible cause of orchitis.
Boron Schiff bases derived from a-amino acids as nucleoli/cytoplasm cell-staining fluorescent probes in vitro
(The Royal Society of Chemistry, 2020-08-26) Lara-Cerón, Jesús A.; Jiménez Pérez, Víctor M.; Xochicale-Santana, Leonardo; Ochoa, María E.; Chávez-Reyes, Arturo; Muñoz-Flores, Blanca M.
The size, shape, and number of nucleoli in a cell's nucleus might help to distinguish a malignant from a benign tumor. Cellular biology and histopathology often require better visualization to understand nucleoli-related processes, thus organelle-specific fluorescent markers are needed. Here, we report the design, synthesis, and fully chemo-photophysical characterization of fluorescent boron Schiff bases (BOSCHIBAs), derived from a-amino acids (i.e., phenylalanine, tyrosine and tryptophan), with nucleoli- and cytoplasm-specific staining in cells. It is the first time that Boron Schiff bases derived from a-amino acids act as notorious dual (nucleoli and cytoplasm) cell-staining fluorescent probes. The boron derivatives not only showed good photostability and acceptable quantum yields ($5%) in solution, but also exhibited low cytotoxicity (>90% cell viability at 0.1 and 1 mg mL 1), which make them good candidates to be used in medical diagnosis.
Capnometry after an inspiratory breath hold, PLATCO2, as a surrogate for PaCO2 in mild to moderate Pediatric Acute Respiratory Distress Syndrome: A feasibility study
(Wiley Periodicals, 2023-07-10) Cruces, Pablo; Moreno, Diego; Reveco, Sonia; Améstica, Marjorie; Araneda, Patricio; Ramirez, Yennys; Vásquez-Hoyos, Pablo; Díaz, Franco
Objective: Accurate and reliable noninvasive methods to estimate gas exchange are necessary to guide clinical decisions to avoid frequent blood samples in children with pediatric acute respiratory distress syndrome (PARDS). We aimed to investigate the correlation and agreement between end‐tidal PCO2 measured immediately after a 3‐s inspiratory‐hold (PLATCO2) by capnometry and PaCO2 measured by arterial blood gases (ABG) in PARDS. Measurements and Main Results: All patients were in volume‐controlled ventilation mode. The regular end‐tidal P P CO ETCO ( ) 2 2 (without the inspiratory hold) was registered immediately after the ABG sample. An inspiratory‐hold of 3 s was performed for lung mechanics measurements, recording PETCO2 in the breath following the inspiratory‐hold. (PLATCO2). End‐tidal alveolar dead space fraction (AVDSf) was calculated as [( – )/ PP P aCO ETCO aCO ] 2 2 2 and its surrogate (S)AVDSf as [( CO – )/ CO PLAT 2 ETCO PLAT 2 P ] 2 . Measurements of PaCO2 were considered the gold standard. We performed concordance correlation coefficient (ρc), Spearman's correlation (rho), and Bland–Altmann's analysis (mean difference ± SD [limits of agreement, LoA]). Eleven patients were included, with a median (interquartile range) age of 5 (2–11) months. Tidal volume was 5.8 (5.7–6.3) mL/kg, PEEP 8 (6–8), driving pressure 10 (8–11), and plateau pressure 17 (17–19) cm H2O. Forty‐one paired measurements were analyzed. PaCO2 was higher than PETCO2 (52 mmHg [48–54] vs. 42 mmHg [38–45], p < 0.01), and there were no significant differences with PLATCO2 (50 mmHg [46–55], p > 0.99). The concordance correlation coefficient and Spearman's correlation between PaCO2 and PLATCO2 were robust (ρc = 0.80 [95% confidence interval [CI]: 0.67–0.90]; and rho = 0.80, p < 0.001.), and for PETCO2 were weak and strong (ρc = 0.27 [95% CI: 0.15–0.38]; and rho = 0.63, p < 0.01). The bias between PLATCO2 and PaCO2 was −0.4 ± 3.5 mmHg (LoA −7.2 to 6.4), and between PETCO2 and PaCO2 was −8.5 ± 4.1 mmHg (LoA −16.6 to −0.5). The correlation between AVDSf and (S)AVDSf was moderate (rho = 0.55, p < 0.01), and the mean difference was −0.5 ± 5.6% (LoA −11.5 to 10.5) Conclusion: This pilot study showed the feasibility of measuring end‐tidal CO2 after a 3‐s end‐inspiratory breath hole in pediatric patients undergoing controlled ventilation for ARDS. Encouraging preliminary results warrant further study of this technique.
The CAPRA-S Score and Immune Dysfunction as a Guide to Outcome in Men Treated with Prostatectomy Radical as Mono-Therapy for Prostate Cancer
(Archivos Españoles de Urología, 2022-08) Murray, Nigel P.; Aedo, Sócrates; Fuentealba, Cynthia; Reyes, Eduardo; Salazar, Aníbal
Objective: Incorporate the immune function as determined by the absolute lymphocyte count (ALC) into the CAPRA-S risk stratification score to determine if predictive values could be improved. Materials and Methods: The clinical pathological findings in the surgical specimen and total PSA were used to define the three CAPRA-S risk groups. One month after surgery and at each follow up total PSA and the ALC were determined, until biochemical failure (BF) or the end of the study period. A cut off value of<1,000 lymphocytes/mm3 was used to define lymphocytopenia (LCP). Each CAPRA-S group was sub- ivided based on the presence or absence of LCP. Kaplan-Meier biochemical failure free survival (BFFS) curves and restricted mean biochemical failure free survival times were calculated for each group. Results: 404 patients participated of whom 103 (25.5%) underwent BF. 270 men were CAPRA-S low risk (LR), 89 intermediate risk (IR) and 45 high risk (HR), of whom LCP was found in 22 (8%) of low risk, 24 (27%) of intermediate risk and 17 (38%) of high risk men. LCP was significantly associated with a higher PSA, higher Gleason and CAPRA-S scores and BF. HRs were 1.76 for IR, 2.49 for HR and 1.29 for LCP. Five-year BFFS for men without LCP, LR 93.5%, IR 61% and HR 36%, for those with LCP, LR 55%, IR 25% and HR 6%. All patients with LCP and IR or HR scores relapsed within 6 years. 10 year BFFS for men without LCP were 71% LR, 43% IR and 23% HR, LR with LCP 16%. Men with BF had increasing LCP approximately 18 months before BF. Conclusions: The incorporation of the ALC taken one month after surgery with the CAPRA-S improves risk stratification; decreases in the ALC suggest that BF is occuring. These results need to be confirmed with larger studies.
Challenges of implementing the Paediatric Surviving Sepsis Campaign International Guidelines 2020 in resource-limited settings: A real-world view beyond the academia
(Sociedad Chilena de Pediatria, 2021) Wooldridge, Gavin; O’Brien, Nicole; Muttalib, Fiona; Abbas, Qalab; Adabie Appiah, John; Baker, Tim; Bansal, Arun; Basnet, Sangita; Campos-Miño, Santiago; Carla de Souza, Daniela; Díaz, Franco; Dramowski, Angela; Fernández-Sarmiento, Jaime; Fustiñana, Ana; González, Gustavo; Jabornisky, Roberto; Jaramillo-Bustamante, Juan Camilo; Chor Yek Kee Yek Kee; Lang, Hans-Joerg; Soares Lanziott, Vanessa; Kohn Loncarica, Guillermo; Mohsenibod, Hadi; Ode, Bunmi; Murthy, Srinivas; Amelie von Saint Andre-von Arnim; Hansmann, Andreas; González-Dambrauskas, Sebastián
The Surviving Sepsis Campaign International Guidelines for the Management of Septic Shock and Sepsis-associated Organ Dysfunction in Children was released in 2020 and is intended for use in all global settings that care for children with sepsis. However, practitioners managing children with sep- sis in resource-limited settings (RLS) face several challenges and disease patterns not experienced by those in resource-rich settings. Based upon our collective experience from RLS, we aimed to reflect on the difficulties of implementing the international guidelines. We believe there is an urgent need for more evidence from RLS on feasible, efficacious approaches to the management of sepsis and septic shock that could be included in future context-specific guidelines.
Clinical and organizational framework of repurposing pediatric intensive care unit to adult critical care in a resource-limited setting: Lessons from the response of an urban general hospital to the COVID-19 pandemic
(Elsevier, 2022) Díaz, Franco; Kehr, Juan; Cores, Camila; Rubilar, Patricia; Medina, Tania; Vargas, Caroline; Cruces, Pablo
Purpose We aim to describe the action plan and clinical results of a COVID-19 unit for adult patient care in units intended for critically ill children, proposing a clinical/administrative framework. Methods We reviewed the preparedness of the PICU team before the surge of cases of COVID-19 and the organizational/administrative issues to increase critical beds in a six-bed PICU allocated to adult critical care in a government-funded general hospital in Latin America. We analyzed the prospectively collected administrative/clinical data of severe COVID-19 cases admitted to PICU during the peak of the first wave of the pandemic. Results We describe a 6-step preparedness plan: recruitment and education, admission criteria, children diversion, team hierarchy, and general and respiratory equipment. The 6-bed PICU was allocated to adult care for 20 weeks, progressively increasing capacity to a 23-bed dedicated COVID-19 unit managed by the PICU team. A six-block bed organizational units were implemented, and personnel increased from 40 to 125 healthcare workers in 24 h shifts. COVID-19 incidence in personnel was 0.5/1000 workdays. One hundred thirty-six patients were admitted, median age 59 (51,65) years old, 68% were male, and 63% had P/F ≤ 100. In addition, 48% received mechanical ventilation, the median length of stay was 7 (3,17), and in-hospital mortality was 15%. Conclusions We propose an organizational framework for the role of PICU in the hospital action plan to increase adult critical beds. The cohort of patients admitted to a PICU repurposed as a COVID-19 ICU had good outcomes. These data are valuable to plan coordinated actions of the healthcare system for future scenarios.
Clinical course of atypical parathyroid neoplasm with soft tissue extension
(Wiley, 2024-08-19) Feldman, Hope; Busaidy, Naifa; Tame-Elorduy, Andres; Silva-Figueroa, Angélica; Halfteck, Gili; Merriman, Kelly; Waguespack, Steven; Graham, Paul; Williams, Michelle; Perrier, Nancy
Background and Objectives: The American Joint Committee on Cancer (AJCC) TNM staging system defines atypical parathyroid neoplasia (APN) as tumor in situ (Tis) and reserves the definition of parathyroid carcinoma (PC) to parathyroid tumor with invasion into surrounding structures. Because the parathyroid gland has no true capsule, “extension” with APN versus microscopic “invasion” of surrounding soft tissue can be difficult and confusing for clinicians. We aimed to determine the clinical course of atypical parathyroid neoplasm with and without soft tissue extension and parathyroid carcinoma with only soft tissue invasion (pT1) and to report the outcomes. Methods: Following an IRB‐approved protocol, we identified all patients treated for parathyroid neoplasm or cancer at our single tertiary care cancer center from 1990 to 2021. We excluded all patients with evidence of clinical or pathologic gross invasion into surrounding structures (pT2 or higher), lymph node involvement, or metastatic disease. By definition, this excluded all cases where the distinction was clinically evident to the surgeon at the time of the operation based on finding a hard, firm, sticky, or discolored parathyroid gland. Only patients with pathologic T1 (pT1) parathyroid carcinoma or APN were included. All pathologic examinations were independently re‐reviewed by a single designated expert senior endocrine pathologist. The definition of APN strictly followed the WHO definition of a clinically worrisome lesion having features including fibrous bands or increased mitotic rate, necrosis, or trabecular growth that did not meet robust criteria for frank invasion. Pathologic T1 disease was defined as invasion limited to soft tissue. Analyses were performed using R version 4.0.2 and Jamovi. Results: Of all PC patients at our institution, only 71 met the strict inclusion criteria of APN or pT1. Forty‐four patients had pT1 disease and 27 had APN: 12 of the APN had soft tissue extension, and 15 had no soft tissue extension. The groups were similar with regard to age at diagnosis (p = 0.328). The average follow‐up duration was 84 months from initial surgical intervention. Of the 12 with APN, one patient (1/12; 8%) with soft tissue extension recurred, developed distant metastases, andsubsequently died during follow up. Of the 44 patients with pT1 PC, six developed distant metastases and 13 (13/44; 30%) died during the follow‐up period. One patient with APN and soft tissue extension recurred and died and no patient with APN and no soft tissue extension died. Conclusions: Patients with APN and extension into soft tissue have a clinical course similar to that of APN without soft tissue extension. APN with soft tissue extension is a different disease from pT1 disease with invasion of soft tissue. The pTis classification appears justified for APN with and without soft tissue extension.
Clinical implications of aberrant anatomy of the common hepatic duct in liver surgery: a systematic review and meta-analysis
(Springer, 2024-09-27) Valenzuela Fuenzalida, Juan José; Avalos Díaz, Constanza; Droguett Utreras, Antonia; Guerra Loyola, Javier; Nova Baeza, Pablo; Orellana-Donoso, Mathias; Suazo Santibañez, Alejandra; Oyanedel Amaro, Gustavo; Sanchis Gimeno, Juan; Bruna Mejias, Alejandro; Gkionoul Nteli, Chatzioglou
Introduction: Knowledge of anatomical variants that affect the hepatic duct (HD) are of particular clinical relevance during hepatobiliary surgical procedures. More specifically, the aberrant anatomy of the common HD is the most common anatomical variation affecting the biliary tree. Below, we describe different classifications of anatomical variants that affect this canal. According to Huang's classification, variations are determined depending on the insertion of the right posterior hepatic duct (RPHD). Materials and methods: Medline, Scopus, Web of Science, Google Scholar, CINAHL, and LILACS databases were investigated until January 2024. The methodological quality was assessed with an anatomical studies assurance tool (AQUA). Pooled prevalence was estimated using a random effects model. For the subgroup analysis, Student's T-test was used. Results: The prevalence rate of aberrant hepatic duct (AHD) was 15% (confidence interval [CI] of 7-22%). The first subgroup had cadavers and images. For the cadavers, the prevalence was 15.83% (CI: 11.22-18.3%), while the images had a prevalence of 22.06% (CI: 18.12-25.33%). This subgroup analysis showed no statistically significant difference between these groups (p = 0.127). The second subgroup comprised the continents where the included studies were from. In this subgroup, no statistically significant differences were found (p = 0.613). Finally, regarding the right or left laterality of the HD variant, there were no statistically significant differences (p = 0.089). Conclusion: A AHD corresponds to a finding that can occur in a significant percentage of our society, which could be an accidental discovery during surgeries or present asymptomatically throughout life and be a cadaveric discovery later. We believe it is important for surgeons to have prior knowledge of the possible variants of HD to prevent possible complications during and after surgery.
Cobertura de partes blandas del Pulgar. Guía en la toma de decisiones
(Elsevier, 2021-02-27) Ruiz Riquelme, Pablo; Urrutia Hoppe, Esteban
Resumen Las lesiones digitales son extremadamente frecuentes y cuando estas involucran al pulgar pueden comprometer importantemente la función de la mano, tanto así que su amputación afecta hasta un 50% la función global de la mano y disminuye su fuerza hasta en un 20%. Para poder mantener el largo del pulgar en muchas ocasiones se requiere de cobertura mediante el uso de colgajos, los cuales no siempre son realizados por un cirujano de mano. La elección correcta del colgajo es esencial para evitar la restricción de movilidad y limitación funcional del dedo lesionado, existiendo múltiples alternativas descritas, que varían en su capacidad de cobertura y complejidad, haciendo difícil una adecuada elección. Nuestro objetivo es resumir y entregar una estrategia de análisis de lesiones del pulgar que permita comprender el tipo de lesión y objetivos del tratamiento quirúrgico, para así optimizar la cobertura según cada caso y los resultados a largo plazo. Nivel de Evidencia: IV

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