Synovial Sarcoma of Thyroid Gland: Case Report and Review of Literatureq

Synovial sarcoma accounts for 5 to 10% of soft tissue sarcoma. It occurs mainly in young adults, where 90% of cases occur before 50 years. Over 80% of cases arise in deep soft tissue of extremities, especially around the joints [1]. Unusual sites (about 15%) have been reported, including head, neck and trunk where differential diagnosis is difficult and surgical treatment is complex due to proximity to vital structures. Here, we report a case of synovial sarcoma in an unusual site which is thyroid gland with special clinical, histopathological, immunohistochemical and molecular features.