Calcifying aponeurotic fibroma: a report of three cases.

Three cases of calcifying aponeurotic fibroma in an 8-year-old boy, a 43-year-old woman and a 48-year-old man are presented. The lesions involved the substance of the palmaris longus tendon, the lateral aspect of the foot at the base of the fifth metatarsal and the fifth digit of the foot, respectively. The clinical and radiologic findings, including ultrasound and computed tomography, are described. Histologic features included chondroid tissue and calcification within areas of proliferative plump fibroblasts in the younger patient, while in the two adults the lesions were more sharply defined showing increased calcification of dense connective tissue with less pronounced cellularity and no evidence of chondroid differentiation.