[Solitary infantile myofibromatosis of the sacrum]

The infantile myofibromatosis is the most common fibrous tumor of infancy. One may find solitary lesions of dermal, visceral, musculoskeletal and subcutaneous tissues. Multiple lesions without visceral involvement generally take a benign course. Because the lesion is commonly known only to pathologists, infantile myofibromatosis is often misdiagnosed and underreported. Therefore we present a review of the pathology and symptoms of infantile myofibromatosis together with a case report of a solitary lesion of bone.