Tenosynovial Chondromatosis of the Ring Finger

Bui-Mansfield LT, Rohini D, Bragg M 59-year-old woman presented with a long history of pain and swelling in her right ring finger. Radiographs showed soft-tissue swelling and a calcified body within soft tissue adjacent to the proximal interphalangeal joint of the ring finger (Figs. 1A and 1B). The patient underwent synovectomy and excision of an extracapsular calcified body adhering to the radial aspect of the flexor tendon of the ring finger. Histologic evaluation showed benign cartilaginous tissue with overlying scant synovial tissue, consistent with tenosynovial chondromatosis (Figs. 1C and 1D). Differential diagnosis of a calcified softtissue mass of the finger includes soft-tissue chondroma, periosteal chondroma, tenosynovial chondromatosis, tumoral calcinosis,