Intramuscular granular cell tumor of the gluteal region.

Granular cell tumors are uncommon, usually benign neoplasms, mainly observed in the head and neck region, chest wall and upper extremities. These tumors account for ~0.5% of all soft-tissue tumors. Less than 2% are malignant. These are associated with poor prognosis. Clinical signs suspicious for malignancy are large size, rapid growth, invasion, recurrence and metastasis. Malignancy is confirmed by histological examination. We present the case of a 79-year-old patient with a 6-month history of a rapidly growing mass in the left gluteal region giving the clinical impression of a malignant tumor. The patient underwent surgical excision of the tumor and the pathology report revealed a granular cell tumor. In difficult cases, multidisciplinary approach is necessary for appropriate diagnosis and management.