Calcaneal tuberosity fractures involve the posterosuperior aspect of the calcaneus and may involve the insertion of the Achilles tendon. In this report, we describe an unusual presentation of a calcaneal avulsion fracture involving 2 displaced fragments in a male patient who did not seek treatment for 1 month after the original injury. The larger fragment contained the insertion of the Achilles tendon, and tendon lengthening was required in addition to fixation of the fracture fragments with cannulated lag screws and washers. After reduction and healing, the patient recovered fully without clinical weakness of the triceps surae.
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