Prominent vascular remnants in the calcaneus
Soccer player with history of multiple frequent ankle injuries and pain in the ankle.
Loading Stack -
0 images remaining
On MRI we see rounded high PD+fat sat and low T1 signal within the calcaneus in a typical subtalar location, venous vessels run out of it in a stellar manner.
A subtalar subcortical signal abnormality in the cancellous bone of the calcaneus near the insertion of the cervical and interosseous ligaments is a benign incidental finding, representing prominent vascular remnants and should not be mistaken for disease. On histology this one looks like thin cortical bone, which is surrounded by normal yellow, fat containing bone marrow and many widened vascular spaces. The main differential diagnosis is a subtalar degenerative subchondral cyst (geode), but having approximately the same look such cyst should be located subarticularly. Simple unicameral bone cyst differs from this phenomenon, because having the same signal it lacks septations, why it is called unicameral.