Musculoskeletal case 19. Presentation

A 33-year-old man presented with a 2-year history of intermittent, progressive, aching pain of his right knee. He had also lately noted some restriction of movement On examination there was mild tenderness over the medial joint line, with minimal swelling. Plain radiographs were initially obtained to evaluate the cause of his pain (Figs. 1 and 2). On the basis of the plain radiographic findings, magnetic resonance imaging was performed. Fig. 3 is a representative sagittal T^sub 2^-weighted gradient echo image and Fig. 4 is a representative transaxial T^sub 2^-weighted image. From these imaging characteristics, what is your diagnosis?

For the diagnosis and discussion see page 468. …