Situation after removal of unstable cartilage in a patient with a central talar ocd in the right ankle. Because of the highly sclerotic and dense bone it was not possible to enter the cyst. The opening of the cyst could however be identified, entered and enlarged (see video).

Picture 2: CT scan showing the cyst with surrounding sclerotic bone, arrow points at he opening of the cyst.

Picture 3: Picture showing a light spot (arrow) at the subchondral bone after a thorough debridement. This is where the cyst is located.

Picture 4: CT scan two weeks post-operative showing the cyst with enlarged opening.

Picture 5: Surgical objective is to remove unstable cartilage, open the cyst and microfracture the walls (C). Or at least to enlarge the entrance of the cyst and microfracture the walls of the cyst as in this case report (D). 

(A) pre-operative situation, (B) this case report: intra-operative situation after removal of unstable cartilage, arrow pointing at the opening of the cyst, (C) Situation after opening and microfracturing of the cyst with shaver (not possible in this patient), (D) post-operative situation this patient: opening is enlarged and microfracturing of the walls is performed.