Epidemiology
A usually benign tumor that, in the musculoskeletal system, can appear in subcutaneous tissue or in deeper planes. Although it is usually benign, a deep lesion of the limb, pelvis, or chest wall that grows or hurts requires stricter study.
Basic features
It is generally a small, firm nodule; rare malignant variants grow quickly or recur.
Usual treatment
Local removal is usual if it causes symptoms or to confirm the diagnosis.
Outcomes and prognosis
Most cases do very well; malignant lesions are exceptional and are managed like a sarcoma.