Granular cell tumor. Clinical spectrum of the benign and malignant entity.

The clinical records of all patients with granular cell tumor seen at our institution over a 20-year period were reviewed. Three patients with malignant, and 37 with benign tumor, were identified. Eleven patients had multiple benign lesions. Three had a history of familial occurrence. Clinical and pathologic features and the management of this nebulous entity, in both its benign and malignant forms, are reviewed and discussed.