Lisfranc's tarsometatarsal fracture-dislocation.

Lisfranc's fracture-dislocation is an injury at the tarsometatarsal joints. Usually the metatarsals dislocate dorsally and laterally. These frectures can be subtle, and a knowledge of the normal relationships is essential. Review of foot radiographs indicated that the most constant normal relationship of the tarsometatarsal joints is the alignment of the second tarsometatarsal joint, which, fortunately, is involved in most Lisfranc's dislocations. There is more variation in normal alignment of the other tarsometatarsal joints, but gross abnormalities are detectable, and the presence of associated chip fractures and clinical correlation will usually clarify more subtle cases.