Head and neck synovial sarcomas.

Eleven cases of synovial sarcoma of the head and neck are analyzed. Patients presented with a mass either in the parapharynx, pharyngeal wall, or nape of the neck. The tumors ranged in size from 3 to 8 cm. Microscopically, the classic biphasic pattern was seen in 10 tumors. Immunohistochemistry and electron microscopy were useful in the diagnosis of the single monophasic variant of synovial sarcoma. Radical surgery was the mainstay of treatment with post-operative radiotherapy for residual disease. Five patients were dead of disease while 6 were alive for periods varying from 9 months to 15 years. The purpose of this presentation is to accrue data on this sarcoma at a rare site, and to highlight the histopathological differential diagnosis, which includes both carcinomas and sarcomas. Treatment decisions would be affected by the histology report.