Abstract
Synovial sarcomas constitute 5-12% of malignant tumors of soft tissue.The majority of synovial sarcomas occur in the extremities, while the occurrence in the region of head and neck is very rare.This paper presents a case of synovial sarcoma in the depth of the cheek.The patient, a 42-year-old woman, visited our clinic on March 8, 1983 complaining of diffuse swelling and pain in the right cheek, and trismus.In the past 6 years she had suffered pain of the same nature several times, and had been treated as an inflammatory disease.The first examination taken revealed diffuse swelling, moderate tenderness on the right cheek and trismus (mouth opening : 18mm) .CT showed a small round mass lesion between masseter muscle and lateral pterygoid muscle on the right side.The operation was done extraorally under general anesthesia on June 22, 1983.The globular tumor about 1.5cm in diameter was located in the pterygomandibular space and was encapsulated by relatively thick pseudocapsule. It was enucleated in some pieces.Microscopically, the majority of the tumor consisted of irregular bands or sheets of relatively uniform spindle cells. It exhibited the monophasic pattern of synovial sarcoma.After operation, a course of radiation totalling 50Gy to the right cheek and an administration of tegaful and UFT totalling 110g were given.The patient is alive at present without recurrence and metastasis of the tumor.
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