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Inicio Revista Española de Patología Sarcoma sinovial intramandibular. A propósito de un caso
Journal Information
Vol. 40. Issue 3.
Pages 188-191 (July - September 2007)
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Vol. 40. Issue 3.
Pages 188-191 (July - September 2007)
Casuística
Sarcoma sinovial intramandibular. A propósito de un caso
Synovial sarcoma of the mandible. A case report
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Telma Meizoso1, Enrique de Álava2, María Garrido-Ruiz1, Ana Belén Enguita1, Miguel Ángel Martínez-González1, Claudio Ballestín1
Hospital Universitario 12 de Octubre, Madrid y Centro de Investigación del Cáncer, Universidad de Salamanca, CSIC, Salamanca
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Resumen
Introducción

El sarcoma sinovial es un tumor de partes blandas poco frecuente en cabeza y cuello y excepcional en la mandíbula.

Presentación del caso

Presentamos un caso de un paciente de 74 años previamente diagnosticado y tratado de osteosarcoma mandibular, que muestra una tumoración en el remanente mandibular con extensión infratemporal. El diagnóstico con microscopía óptica, técnicas inmunohistoquímicas y ultraestructura fue de sarcoma sinovial monofásico. Se realizó estudio genético para la traslocación t (x;18) que resultó positiva, confirmándose el diagnóstico de recidiva local por sarcoma sinovial. La biopsia previa estaba erróneamente diagnosticada.

Conclusiones

El sarcoma sinovial monofásico requiere diagnóstico diferencial con otras entidades. Es una tumoración que recidiva en más de la mitad de los casos y presenta un riesgo elevado de metástasis. Su diagnóstico exacto necesita un buen procesamiento tisular, técnicas inmunohistoquímicas, ultraestructurales y estudio genético.

Palabras clave:
Sarcoma sinovial
Mandíbula
t(x ;18)
Summary
Introduction

Synovial sarcoma is an unusual soft tissue tumour of the head and neck. It is extremely rare on the mandible.

Case presentation

We present here a case of a 74 year-old man previously diagnosed and treated of jaw osteosarcoma. Five years later the patient showed a neoplasm recurrence on the remaining mandibular condyloid, extending to the temporal bone. The diagnosis with light microscopy, immunohistochemical staining, and ultrastructure was monophasic synovial sarcoma. The characteristic chromosomal translocation t(x;18) was founded on the cytogenetic study, confirming the diagnosis of local recurrence of synovial sarcoma. The previous biopsy was misdiagnosed.

Conclusions

The monophasic synovial sarcoma needs a differential diagnosis with other neoplasms. More than 50% of the cases shows recurrence and have a high rate of distant metastases. Adequate tissue sampling, immunohistochemical, ultraestructural and characteristic chromosomal translocation findings are necessary for diagnosis.

Key words:
Synovial sarcoma
mandible
t(x ;18)

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