Talar neck fracture-a rare but important complication following subtalar arthroereisis.

Subtalar arthroereisis is a technique for treating symptomatic flexible flatfeet by means of inserting an implant or stent into the sinus tarsi. The goals are to reduce pain, deformity and instability of the foot. However, there are recognised complications associated with this technique which include malposition of the implant, undercorrection/overcorrection of the deformity, persistent sinus tarsi pain, deep medial heel pain, foreign body synovitis, avascular necrosis of the talus, intraosseous cystic formation in the talus, migration of the implant, device extrusion and subtalar joint arthrosis. In this report an unusual complication of fracture of the neck of the talus in a teenager who competes recreationally in 'at risk'/impact sports, who had previously had arthroereisis screw insertion some years before is presented.