summary Calcifying Aponeurotic Fibromas are benign fibrogenic masses that usually present as a painless mass in the hands and feet in children and young adults. Diagnosis is made with a biopsy showing fibrous tissue with central region of calcification and cartilage formation Treatment is generally observation as the lesion often resolves with maturity Presentation Symptoms painless slow growing mass in hands and feet Evaluation Radiographs show a faint mass with stippling Histology Characteristic findings fibrous tissue with central region of calcification and cartilage formation Treatment Nonoperative observation lesion often resolves with maturity Operative local excision recurrence in up to 50%