Histiocytic sarcoma of the base of tongue treated with radical radiotherapy: A case report and review of the literature

Histiocytic sarcoma (HS) is an exceedingly rare and aggressive neoplasm of lymphoid and haematopoietic tissues and expresses histological and phenotypical characteristics of mature histiocytes. There have only been a few cases of documented HS in the head and neck region. Whilst patients with HS often have nodal or disseminated disease, patients can present with localised disease. There are currently no established treatment guidelines, and...