A 23-year-old male with medial left ankle pain. (A) Sagittal and (B) coronal CT MPR of the left ankle showing a shallow elongated medial osteochondral lesions of the talus (OLT) (arrows). The fragmented sclerotic appearance of the lesion would suggest that it is necrotic. (C) Sagittal T1W TSE and (D) STIR MR images demonstrate linear fluid signal intensity (SI) at the junction of the lesion and host bone suggesting that the fragment is unstable.