Posterior Ankle Arthroscopy for Osteochondromatosis of the Posterior Ankle Extra-Articular Space with a Longitudinal Tear of Flexor Hallucis Longus

<div>Arthroscopic views of the posterior aspect of the right ankle. (a) A large loose body from the right posterior ankle extra-articular space (arrow) can be visualized. The arrowhead follows the superior-posterior aspect of the calcaneus. (b) Friction between a loose body (arrow) and the FHL tendon (arrowhead) can be seen. (c) A longitudinal tear and fibrillation were detected in the FHL tendon (arrow). FHL: flexor hallucis longus.</div>

Case Reports in Orthopedics

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Figure 5

Figure 5: Posterior Ankle Arthroscopy for Osteochondromatosis of the Posterior Ankle Extra-Articular Space with a Longitudinal Tear of Flexor Hallucis Longus 

Figure 5 | Posterior Ankle Arthroscopy for Osteochondromatosis of the Posterior Ankle Extra-Articular Space with a Longitudinal Tear of Flexor Hallucis Longus 