Radiographically, the lesions are 1 to 3 cm. There may be some mineralization within the lesion. The margin may be latent or active. Biopsy is not indicated or warranted. A lesion whose nature is in doubt should be referred by an orthopaedic oncologist.
Treatment consists of reassurance, observation, and occasionally radiographic follow-up.
The prognosis is excellent and the lesion will spontaneously resolve in early adulthood. Primary musculoskeletal tumors of fibrous origin.