Sinonasal Synovial Sarcoma Masquerading as A Common Soft Tissue Tumor: A Diagnostic Challenge and Literature Review

Synovial sarcoma is a malignant soft tissue neoplasm which amounts to 7-10% of all sarcomas. Clinicopathological heterogeneity within this tumour creates a diagnostic challenge in sorting it out from its differential diagnoses. Here we report a 42-year-old female patient presenting with a mass in the right nasal cavity for two months. With an imaging impression of a right ethmoidal polyp with a remote possibility of malignant etiology, a final diagnosis of sinonasal synovial sarcoma was made with the help of a panel of IHC antibodies. A high degree of suspicion along with a detailed work up is required to accurately diagnose synovial sarcoma in unlikely locations such as nasal cavity. Keywords: Synovial sarcoma, Nasal cavity, TLE­1, BCL2, SOX 10