Volumen plaquetario medio e índice de plaquetas-linfocitos como factores de pronóstico en cáncer papilar de tiroides.

BACKGROUND: Papillary thyroid cancer is the most common endocrine neoplasia. There are prognostic factors that establish risk of recurrence and mortality; however, patients considered low risk may have a less favorable evolution and hence the importance of finding new markers. OBJECTIVE: To assess whether the mean platelet volume (MPV) and the platelet-lymphocyte index (PLI) show a relationship with the clinical staging in papillary thyroid cancer. METHOD: Retrospective, observational and analytical study. Preoperative MPV and PLI were recorded, its relationship with TNM and MACIS systems was sought, as well as locally advanced invasion and tumor focality. RESULTS: 107 cases treated from November 2017 to February 2020. No statistically significant difference was observed in these two preoperative parameters with advanced and initial stages, risk groups or tumor focality. The statistical analysis used was one-way ANOVA with SPSS 25, a 95% confidence interval and p < 0.05. CONCLUSIONS: Despite the logical reasoning of tumor pathophysiology, our study did not find a relationship between papillary thyroid carcinoma with MPV and PLI, and should be complemented with more extensive studies.

ANTECEDENTES: El cáncer papilar de tiroides es la neoplasia endocrina más frecuente. Existen factores pronósticos que establecen el riesgo de recurrencia y mortalidad; sin embargo, los pacientes considerados de bajo riesgo pueden llegar a presentar una evolución menos favorable, y de ahí la importancia de encontrar nuevos marcadores. OBJETIVO: Evaluar si el volumen plaquetario medio (VPM) y el índice plaquetas-linfocitos (IPL) presentan una relación con la etapificación clínica en el cáncer papilar de tiroides. MÉTODO: Estudio retrospectivo, observacional y analítico. Se registraron el VPM y el IPL preoperatorios, y se buscó su relación con los sistemas TNM y MACIS, así como con la invasión localmente avanzada y la focalidad del tumor. RESULTADOS: Se trataron 107 casos de noviembre de 2017 a febrero de 2020. No se observó diferencia estadísticamente significativa en estos dos parámetros preoperatorios o en estadios avanzados e iniciales, grupos de riesgo ni focalidad del tumor. El análisis estadístico utilizado fue ANOVA de una vía, con SPSS 25, con intervalo de confianza del 95% y p < 0.05. CONCLUSIONES: Pese al razonamiento lógico de la fisiopatología tumoral, en nuestro estudio no se encontró relación entre el carcinoma papilar de tiroides, el VPM y el IPL, y debiera complementarse con estudios más extensos.

Hyperparathyroidism during pregnancy. Is it a diagnostic and therapeutic challenge?

BACKGROUND: Primary hyperparathyroidism (PHPT) is characterized by an increase in parathyroid hormone (PTH) and hypercalcemia, which, when present during pregnancy, increases both maternal and fetal morbidity and mortality. OBJECTIVE: Emphasize the importance of surgical intervention in primary hyperparathyroidism during pregnancy. CLINICAL CASE: A 27-year-old female with a pregnancy of 27.2 weeks of gestation, with a diagnosis of symptomatic primary hyperparathyroidism secondary to parathyroid adenoma, a history of nephrolithiasis and severe acute pancreatitis, surgery was decided upon finding intrathyroid right parathyroid adenoma, post-surgical course with adequate evolution and remission of hyperparathyroidism. CONCLUSIONS: Parathyroidectomy in primary hyperparathyroidism during pregnancy is safe.

INTRODUCCIÓN: El hiperparatiroidismo primario (HPTP) se caracteriza por un aumento de la hormona paratiroidea (PTH) e hipercalcemia, que aumenta la morbimortalidad materna y fetal cuando se presenta durante el embarazo. OBJETIVO: Enfatizar la importancia de la intervención quirúrgica en el hiperparatiroidismo primario durante el embarazo. CASO CLÍNICO: Paciente femenino de 27 años de edad con embarazo de 27.2 semanas de gestación, con diagnóstico de hiperparatiroidismo primario sintomático secundario a adenoma paratiroideo, antecedentes de nefrolitiasis y pancreatitis aguda grave; al decidir realizar un procedimiento quirúrgico se identificó un adenoma paratiroideo derecho intratiroideo; el curso posquirúrgico mostró adecuada evolución y remisión del hiperparatiroidismo. CONCLUSIÓN: La paratiroidectomía en el hiperparatiroidismo primario durante el embarazo es segura.

[Divertículo de Zenker. Manejo endoscópico contra técnica abierta. ¿Cuál es mejor? Experiencia en el Hospital General de México Dr. Eduardo Liceaga]. / Zenker's diverticulum: endoscopic versus surgical approach. Which is better? Experience in the General Hospital of Mexico Dr. Eduardo Liceaga.

INTRODUCCIÓN: El divertículo de Zenker es una enfermedad rara en la población general. Su tratamiento puede llevarse a cabo mediante un enfoque endoscópico o quirúrgico. OBJETIVO: Reportar la experiencia en el manejo del divertículo de Zenker en un centro de enseñanza de tercer nivel. MÉTODOS: Estudio retrospectivo, transversal, descriptivo, en el que fueron analizados los expedientes de todos los pacientes con diagnóstico de divertículo de Zenker desde la formación de la clínica de tracto digestivo superior del Hospital General de México Dr. Eduardo Liceaga. RESULTADOS: Se encontraron 14 casos con diagnóstico de divertículo de Zenker, 10 tratados con técnica transoral y 4 por cirugía abierta. Se presentaron tres recidivas en la técnica transoral y ninguna con la técnica abierta. En cuanto a las complicaciones, hubo una lesión dental con la técnica transoral y una fístula esofágica con cirugía abierta, que fue manejada con sonda nasoyeyunal colocada por endoscopia hasta el cierre espontáneo de la fístula. CONCLUSIÓN: El grapado transoral es una técnica con buenos resultados estéticos, pero en nuestra experiencia presenta mayor recurrencia que la cirugía abierta, por lo que debemos realizar un seguimiento a largo plazo de nuestros pacientes. BACKGROUND: Zenker diverticulum is a rare disease in the general population. Its treatment can be carried out by either an endoscopic or surgical approach. OBJECTIVE: To report the experience in the management of the Zenker diverticulum in a tertiary education center. METHODS: Retrospective, cross-sectional, descriptive study in which the files of all patients with diagnosis of Zenker diverticulum were analyzed from the formation of the upper digestive tract clinic of the General Hospital of Mexico Dr. Eduardo Liceaga. RESULTS: We found 14 cases with diagnosis of Zenker diverticulum, 10 treated with transoral technique and 4 for open surgery. Three recurrences in the transoral technique, no relapse with open technique. In terms of complications, one dental lesion was presented in the technique transoral, and one esophageal fistula in open surgery, managed with a nasojejunal tube placed by endoscopy until the spontaneous closure of said fistula. CONCLUSIONS: Transoral stapling is a technique with good aesthetic results. However, in our experience, it has a greater recurrence than open surgery, which is why we must carry out a long-term follow-up of our patients.

BRAF 1799T>A Mutation Frequency in Mexican Mestizo Patients with Papillary Thyroid Cancer.

Thyroid cancer is the most frequent endocrine malignancy, and its incidence and prevalence are increasing worldwide. Despite its generally good prognosis, the observed mortality rates are higher in the less-developed regions. This indicates that timely diagnosis and appropriate initial management of this disease are important to achieve a positive outcome. We performed an observational study in order to describe the frequency of the BRAF 1799T>A mutation in Mexican mestizo patients with thyroid nodules, a scarcely studied ethnic group with large populations. Competitive allele-specific Taqman PCR was performed in 147 samples of thyroid tissue DNA obtained from patients histologically diagnosed with papillary thyroid cancer (PTC), colloid goiters, and follicular adenomas. The BRAF 1799T>A mutation frequency was 61.1% in PTC samples (p = 4.99 × 10-11). Potential diagnostic values were as follows: sensitivity, 61.1%; specificity, 96%; PPV, 94.2%; NPV, 69.5%; accuracy, 77.9%. Taking into account the fact that this mutation is not frequently found in cytologically indeterminate nodules, we suggest that the BRAF mutational analysis should be implemented in the clinical setting along with other diagnostic criteria such as USG, in order to contribute to diagnosis and to surgical decision-making during the initial management of thyroid nodules in Mexican public hospitals.