Hallux checkrein deformity resulting from the scarring of long flexor muscle belly - case report.

A case of posttraumatic checkrein deformity of the hallux is presented. This deformity is most often caused by scarring of the muscle belly or tethering of the tendon. A 22-year old woman developed a hallux checkrein deformity after a bimaleolar fracture. Intraoperatively, a linear scar tethering the muscle belly to the posterior tibia was observed. Resection of the scar allowed for full flexor hallucis longus mobility. Full hallux range of motion as well as foot function was restored. The cause of the checkrein deformity in our patient was a scar tethering the flexor hallucis belly to the posterior tibia.