Fig 1.

Preoperative and postoperative 3-dimensional computed tomography (3D-CT) of the right calcaneus of a patient with insertional Achilles tendinopathy who underwent fluoroscopic and endoscopic calcaneal exostosis resection and Achilles tendon debridement. (A) Preoperative 3D-CT. Before surgery, the surgeon should confirm the shape of the exostosis (especially medial and lateral edge) and intratendon ossifications (circles). (B) Postoperative 3D-CT. The medial and lateral edge of the calcaneal exostosis and the portion of intratendon ossification were left unresected (gray arrowheads). The patient had moderate postoperative pain at the lateral edge of the unresected exostosis (white arrowheads), underwent the same endoscopic surgery again, and achieved pain relief.