A 44-year-old woman was presented to a general physician with pain and swelling of her right knee . She had experienced similar symptoms in her pregnancy 3 years ago but had not undergone any investigations at that time. After the clinical and physical examination, a provisional diagnosis of recurrent meniscal injury was made and referred to the radiologist for MRI (magnetic resonance imaging) scan. The MRI plain scan showed mild degenerative changes and several small loose bodies above and below the knee joint.

The radiologist reported these findings as non-significant and advised patient, a course of physiotherapy. One year later the patient re-presented with acute locking of the knee after an aerobic exercise. She also reported difficulty in sleeping and decreased movements in the knee joint. This time physician referred her to the specialist, who noted tenderness over the medial…