Imaging of shoulder instability.

This extended review tries to cover the imaging findings of the wide range of shoulder injuries secondary to shoulder joint instability. Usefulness of the different imaging methods is stressed, including radiography, computed tomography (CT) and magnetic resonance. The main topics to be covered include traumatic, atraumatic and minor instability syndromes. Radiography may show bone abnormalities associated to instability, including developmental and post-traumatic changes. CT is the best technique depicting and quantifying skeletal changes. MR-arthrography is the main tool in diagnosing the shoulder instability injuries.

Synovial knee affected in multiple hemangiomatosis.

Synovial hemangioma is a vascular lesion of joint cavities. It is a rare cause of pain and spontaneous hemarthrosis in the paediatric age group. It is often seen as an internal derangement of the knee. We present the case of a 37-year-old woman with a history of recurrent effusions of this joint. The MRI showed a soft tissue mass affecting the Hoffa's fat pad and the synovial surrounding the patella. Other hemangiomas were detected in other sides of the body. Through arthroscopy, we eliminated all the pathological tissue of the knee. The patient remains asymptomatic after 1 year.