A Case of Metastatic Gastric Synovial Sarcoma / 대한소화기내시경학회지

Synovial sarcomas are malignant soft tissue neoplasms that develop from tendon and bursa near the large joints and frequently occur in the lower extremities of young male adults. They usually recur within 2 years after surgical treatment. The lung is a common metastatic site and rarely reported as the primary site of synovial sarcoma. The stomach is a very rare primary site of synovial sarcoma and recently only two cases of primary gastric synovial sarcoma were reported. We report a case of metastatic gastric synovial sarcoma in a 53-year-old male 4 years after surgical treatment of primary lung synovial sarcoma. The tumor had histologic, immunohistochemical and ultrastructural features of biphasic synovial sarcoma of the soft tissue.