Introduction: The diagnosis of sarcoma in the head and neck is unusual, so the case of a 53-year-old female patient with myxoid liposarcoma in the hypopharynx is reported due to its rarity in this location. Case of report: Clinically, tumor growth is associated with dysphagia, dysphonia, and obstruction. Imaging characteristics may contribute in a magnetic resonance study; however, the definitive diagnosis is histological and genetic. This diagnosis is often difficult and generally only recognized with recurrences. The treatment of choice is surgical with or without chemotherapy/radiotherapy, with myxoid liposarcoma being particularly radiosensitive. Conclusion: Local recurrence is common, but metastasis seldom occurs. This case contributes to Latin American literature and emphasizes the importance of early recognition of the disease, considering the required histological characteristics...

The neurofibroma of the bile duct is an extremely rare and generally asymptomatic disease, however, it maybe cause obstructive jaundice and mimic a Klatskin tumor, leading to radical surgical treatment and increased patient morbidity. We present the case of a 62-year-old woman who underwent cholecystectomy 10 years ago, with jaundice and pain in the right upper quadrant, as well as auxiliary tests compatible with cholestasis. Dilation of the bile duct and the presence of a tumor in the left hepatic duct were observed by magnetic cholangioresonance. The preoperative clinical diagnosis was hilar cholangiocarcinoma, but the histopathological study revealed a neoplasm composed of spindle cells without atypia or mitotic activity, whose neurogenic lineage supported by its positivity to protein S100 in immunohistochemistry. We report the case given its infrequency in the literature and i...

Los nódulos son la afección más frecuente de la glándula tiroides, su hallazgo ha incrementado a nivel nacional y hasta 10% pueden representar patología maligna. La biopsia por aspiración con aguja fina permite el estudio citológico de estas lesiones que, según su clasificación diagnóstica por Sistema Bethesda, establecerá un valor pronóstico y manejo ideal para el paciente, evitando así procedimientos quirúrgicos innecesarios. El médico especialista en anatomía patológica es quien realiza esta evaluación y posterior estudio histológico en caso de tiroidectomía. El presente proyecto tiene como objetivo conocer la concordancia citológica e histológica en estos pacientes, siendo la hipótesis que ésta sea alta. Para ello se llevará a cabo una búsqueda virtual de ambos diagnósticos que comprenderá desde el 01 de julio del 2018 hasta el 31 de diciembre del 2020 con...

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