Fig. 21From: Traumatic and non-traumatic bone marrow edema in ankle MRI: a pictorial essayA 16-year-old male with chronic posterior ankle pain and a suspected os trigonum with impingement. (1) MRI showed an os trigonum with BME, (2) effusion and synovitis, and (3) degenerative cysts (4) along the articulation with the posterior talar processBack to article page