Two patients are presented who had malignant fibrous histiocytomas of the skin and soft tissue. These tumors characteristically consist of a solitary mass, 0.5 cm to 12.0 cm, which has skin fixation, is circumscribed and firm. Microscopically, there is a pattern of histiocytes and bizarre histiocytic giant cells intermingled in a fibrous stroma with fibroblasts arranged in a whirling pattern. T...

Myofibroma is a solitary benign tumor of myofibroblasts. Myofibromatosis describes multiple, simultaneous myofibromas at different sites in various organs. Myofibromatosis is a rare but well recognized entity which was originally thought to affect only neonates and infants. It is now apparent however that adults may also be affected. Solitary cases affecting the oral cavity appear to be rare. T...