Myxofibrosarcoma of maxilla: A case report of rare entity

Abstract

Myxofibrosarcoma is one of the most common sarcomas in the extremities of elderly patients that rarely affect the oral cavity. In this article we describe a case of primary myxofibrosarcoma of maxilla in a 19-year-old boy. Microscopically the tumor showed loosely arranged spindle-shaped tumor cells with mild pleomorphic spindle-shaped nuclei, some with minute nucleoli in a fibromyxoid stroma. The cells were strongly immunoreactive for vimentin and negative for CD-68, S-100 protein and desmin. Based on clinical, histological and immunohistochemical findings, a final diagnosis of myxofibrosarcoma was established. It is an unusual aggressive variant that frequently recurs and metastasizes, reinforcing the importance of its correct diagnosis. We report a rare case of myxofibrosarcoma in maxilla, with emphasis on immunohistochemical findings.

Keywords

• Fibrosarcoma
• immunohistochemistry
• maxilla
• myxofibrosarcoma