Abstract
Synovial sarcoma (SS) of oral cavity is very rare tumor. Only 3-10% of all synovial sarcomas originate in the head and neck. It is more commonly seen in young male population. The most common sites in the head and neck region are hypopharynx and parapharyngeal spaces. IHC is usually required for diagnosis. Its nature and biological behavior is quite different than squamous cell carcinoma of oral cavity. It is an aggressive tumor with poor prognosis.We had such case of SS of lower gum and alveolus. Patient underwent surgical excision of the tumor with neck dissection and adjuvant radiotherapy on the basis of various prognostic factors.