A, Mark tip of lateral malleolus and lateral border of Achilles tendon. While holding ankle in neutral, draw a line between these two landmarks. Make incision on lateral border of Achilles tendon, proximal to line. Orange oval indicates location of anterolateral portal. B, Posteromedial portal made medial to Achilles tendon at same level as posterolateral portal. C, Tibiotalar and subtalar joints after removal of fatty tissue, part of posterior joint capsule, intermalleolar ligament, and posterolateral tubercle of talus (FHL, flexor hallucis longus). D, Debridement of posterior subtalar facet performed from posterior to anterior until interosseous talocalcaneal ligament is reached (black asterisk, interosseous talocalcaneal ligament; two white asterisks, full-radius shaver). E, Incision made in center of heel to allow placement of cannulated screws from posterior tuberosity of calcaneus to talar body. F, Subtalar joint arthrodesis with cannulated stabilization screws placed from posterior tuberosity of calcaneus to talar body. (From Devos Bevernage B, Goubau L, Deleu PA, et al. Posterior arthroscopic subtalar arthrodesis, JBJS Essential Surg Tech 5[4]:e27, 2015.) SEE TECHNIQUE 50.3.