The First Tarsometatarsal Joint in Lisfranc Injuries.

The overwhelming majority of Lisfranc midfoot injuries seen at our tertiary referral center had imaging evidence of damage to the first TMT joint (86%), and the incidence may be higher. The most common patterns of first TMT joint involvement we found were joint incongruity, articular surface fractures, angulation of the articular surfaces, and medial capsular ligament avulsion fractures. A better understanding of injuries to the first TMT joint can help orthopaedic surgeons with diagnosis.