Extra-articular lateral hindfoot impingement syndrome

Extra-articular lateral hindfoot impingement syndrome refers a non-traumatic cause of ankle impingement. This can include talocalcaneal, subfibular, and /or talocalcaneal-subfibular impingements.

It presents as the sequela of a pathological tibialis posterior tendon, which causes pes planus (flatfoot) and hindfoot valgus deformity. Healed intra-articular calcaneal fractures, neuropathic arthropathy and inflammatory arthritides may also play a causative role.