Asymptomatic synovial chondromatosis of the ankle: an incidental finding.

Synovial chondromatosis is an uncommon, benign lesion of nodular cartilaginous neoplastic development of the synovium that can lead to loose bodies and arthritic degeneration if left untreated. Although very rare, malignant transformation to chondrosarcoma can occur. Primary and secondary forms of synovial chondromatosis also exist, and each has distinct clinical, radiographic, and histologic characteristics.

Lipofibromatous hamartoma of nerve.

Lipofibromatous hamartoma is an uncommon, benign, fibrofatty tumor that can involve peripheral nerve tissue. We report a rare neural lipofibroma of the foot in a 6-year-old boy.