Epidemiology
A benign cartilage lesion outside the bone, common in the hands and feet of adults. In the fingers, hand, or foot, calcification within a small mass points to the diagnosis and helps plan a limited resection.
Basic features
It can calcify and present as a firm nodule near tendons, joint capsules, or tendon sheaths.
Usual treatment
Local removal is indicated if it hurts, limits function, or the diagnosis is not certain on imaging.
Outcomes and prognosis
The prognosis is very good; it can recur locally if the resection is incomplete.