Low-Grade Fibromyxoid Sarcoma of the External Auditory Canal: A Rare Pathology and Unusual Location.

Low-grade fibromyxoid sarcoma (LGFMS) is an enigmatic soft tissue tumor. It frequently presents as a deeply seated mass in the proximal extremities and trunk. Superficial LGFMSs of the head and neck are exceedingly rare. Hyalinizing spindle cell tumor with giant rosettes (HSTGR) is an entity considered to be on the histologic spectrum of LGFMS. We present a case of a 44-year-old female who presented with a superficial, polypoid mass of the external auditory meatus. Microscopic examination revealed the classic histologic features of HSTGR. To our knowledge, this case is the first described at this extremely unusual location. Identification and reporting of such unusual cases is important to understand and compare the behavior of superficial LGFMS to that of the more common deeply seated tumors.