Fig. 2. Postoperative magnetic resonance imaging (MRI) of patient no. 2 and patient no. 4. (A) Postoperative MRI of patient no. 2 revealing presence of a floating necrotic bone fragment within a cystic lesion over the medial malleolar axilla. (B) Ten-month postoperative MRI of patient no. 4 showing bone drill pathway remnant (arrow heads) and evidence of cystic lesion (arrow) over the medial malleolus.