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Osteochondral lesions of the tarsal navicular are uncommon but can lead to long-term complications if misdiagnosed or left untreated. Recent literature suggests successful outcomes with the use of microionized cartilage matrix allograft for the treatment of osteochondral lesions in the ankle. In this report we will present a unique case of navicular osteochondral lesion in a collegiate-level dancer which the patient suffered during a competition. The patient ultimately went on to have surgical intervention including curettage, bone marrow stimulation, and application of an extracellular matrix consisting of microionized cartilage combined with platelet-rich plasma. After a relatively short postoperative course, the patient subsequently returned to activity without reinjury or restrictions. Thirteen-month follow-up yielded an increase in American Orthopedic Foot and Ankle Society hindfoot score by 44 when compared to preoperatively. To our knowledge this is the first case of osteochondral lesion of the tarsal navicular treated with microionized cartilage matrix allograft. Excellent post-operative outcome with a relatively quick return to activity indicate this technique as a viable option for treatment of osteochondral lesions of the tarsal navicular.

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