The importance of arthroscopy in diagnosing synovial haemangioma of the knee joint.

In connection with one of their cases, authors call attention to the importance of differential diagnosis in synovial haemangioma of the knee joint, a rare condition. They also give a survey of its clinical, radiological and pathological features, review the literature on the topic, with special emphasis on the importance of arthroscopy in making the clinical diagnosis, and describe the treatment applied in their case.