Adult spindle cell/ sclerosing rhabdomyosarcoma of the buccal maxillary gingiva: Unique entity, a rare case report

Rhabdomyosarcoma is a malignant neoplasm of mesenchymal cells, which shows varying degrees of striated muscle cell differentiation. It predominantly occurs in children while rarely found in adults. Involvement of the oral cavity accounts for only 10-12% of all head and neck cases. Herewith, we report a rare case of oral spindle cell / sclerosing rhabdomyosarcoma in a 47-year-old male presented with a small mass involving the gingiva of right upper incisor. The mass was excised with a preoperative diagnosis of gingival epulis and subjected to histopathological and immunohistochemical examination which confirmed it to be spindle cell / sclerosing rhabdomyosarcoma. Data regarding its clinical course, genetic abnormalities and prognosis as a combined subtype is scant.   Keywords: Adult spindle cell/sclerosingrhabdomyosarcoma (S­ScRMS) Oral Cavity, Rhabdomyosarcoma, Maxillary Gingiva, Immunohistochemistry