Osteochondromas are benign bone tumors that arise from divergent cartilage formation most commonly in childhood versus adulthood. We report the case of a 42-year-old healthy female who presented with a unusual solitary posterolateral ankle mass with associated pain and ankle impingement with 6 weeks follow up. The patient was successfully treated with open surgical excision with bone with pathology diagnosis of benign osteochondroma. The patient returned to normal baseline function with no pain at 6 weeks follow up. Open posterior ankle incision approach performed to remove suspicious enlarged bony growth from posterior talar process sent to pathology. Pathology report returned benign osteochondroma of the posterior talar process and patient subsequently had routine healing of post op incision site and return to full function without pain or disability at 6 weeks follow up. This case study adds to the current understanding, incidence, occurrence, and treatment of rare osteochondromas occurring in the posterior talar process.

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