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Sarcoma fibromixoide de bajo grado con metástasis pulmonares. Reporte de un caso raro / Low-grade fibromyxoid sarcoma with pulmonary metastasis. A rare case report

Hugo Eduardo Morales-De Fuentes, María Fernanda Monraz-Méndez

Resumen


Resumen

Introducción: El sarcoma fibromixoide de bajo grado es un tumor muy raro que tiende a desarrollarse en tejidos blandos profundos de jóvenes adultos y tiene el potencial de recurrencia local y metástasis a distancia.

Caso clínico: Presentamos el caso de un hombre de 36 años con un sarcoma fibromixoide de bajo grado en el hombro derecho, el cual fue inicialmente reportado como un tumor, de 4 años de evolución, sometido a resección amplia con reporte histopatológico de sarcoma fibromixoide de bajo grado, cuyo borde quirúrgico profundo estaba en contacto con el hueso. Se realizó tomografía simple y contrastada, en la que se observó una lesión pulmonar izquierda de 8 mm en el lóbulo superior, segmento inferior lingular, de contenido heterogéneo, hiperdensa con reforzamiento del medio de contraste. Se realizó toracotomía lateral izquierda para metastasectomía y el estudio patológico corroboró el diagnóstico de metástasis del sarcoma fibromixoide.

Conclusión: El sarcoma fibromixoide de bajo grado histológico es un tumor muy raro que se debe diferenciar de otros tumores de tejidos blandos. Se reportan recidivas y metástasis, a pesar de periodos libres de enfermedad cortos o prolongados de hasta 50 años, por lo que se debe dar seguimiento a los pacientes con el antecedente de este tumor.

 

Abstract

Background: Low-grade fibromyxoid sarcoma is a very rare tumor that tends to develop in deep soft tissues of young adults and has the potential for local recurrence and distant metastasis.

Clinical case: We present the case of a 36-year-old man with a low-grade fibromyxoid sarcoma in the right shoulder, which was initially reported as a 4-year-old tumor, undergoing extensive resection with a histopathological report of low-grade fibromyxoid sarcoma, whose deep surgical edge was in bony contact. A simple and contrasted axial tomography was performed where an 8 mm left lung lesion was observed in the upper lobe lower lingular segment of heterogeneous content, hyperdense with contrast medium reinforcement. Left lateral thoracotomy is performed for metastasectomy and pathology corroborates the diagnosis of metastasis from fibromyxoid sarcoma.

Conclusion: Low histological fibromyxoid sarcoma is a very rare tumor that must be differentiated from other soft tissue tumors. Recurrences and metastases are reported, despite short or prolonged disease-free periods of up to 50 years, so patients with a history of this tumor should be followed up.


Palabras clave


Sarcoma; Neoplasias Pulmonares; Metástasis de la Neoplasia / Sarcoma; Lung Neoplasms; Neoplasm Metastasis

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Referencias


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DOI: https://doi.org/10.24875/RMIMSS.M20000022

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