A Case of Calcifying Aponeurotic Fibroma Arising in the Medial Pterygoid Muscle

The tumor that was previously designated as a fibroma of the palms and soles in young children was named in 1953 by Keasbey as juvenile aponeurotic fibroma. It has subsequently become apparent that this lesion affects a much wider age range than other forms of juvenile fibromatosis and may occur in young adults and, rarely, in older adults. In view of the wide age range of patients, the term juvenile aponeurotic fibroma was changed to aponeurotic fibroma and calcifying aponeurotic fibroma. The lesion has been documented in the orthopedic literature as a slow-growing, benign, painless tumor with a predilection for the distal portions of the extremities in young children. However, there have been no maxillofacial cases in the literature. The following report describes a case of calcifying aponeurotic fibroma arising in the medial pterygoid muscle.