Lisfranc fractures involve which joints?

Lisfranc fractures involve which joints?

• A. Jones fracture
• B. Lisfranc fracture
• C. Bennett fracture
• D. Boxer's fracture

Answer: (B)

The main idea is identifying where a Lisfranc injury occurs. Lisfranc injuries involve the tarsometatarsal joints in the midfoot—the joints where the bases of the metatarsals connect with the distal row of tarsal bones (the cuneiforms and cuboid). This area is held together by strong ligaments, including the Lisfranc ligament between the medial cuneiform and the base of the second metatarsal, which acts as a keystone for the midfoot arch. When these joints are injured, you get fracture-dislocations across the tarsometatarsal joints, leading to instability and midfoot pain. For context, the other options refer to injuries in different locations: a Jones fracture is at the base of the fifth metatarsal in the foot, a Bennett fracture is at the base of the first metacarpal in the hand, and a Boxer's fracture is at the neck of the fifth metacarpal in the hand. None of those involve the midfoot tarsometatarsal joints.

The main idea is identifying where a Lisfranc injury occurs. Lisfranc injuries involve the tarsometatarsal joints in the midfoot—the joints where the bases of the metatarsals connect with the distal row of tarsal bones (the cuneiforms and cuboid). This area is held together by strong ligaments, including the Lisfranc ligament between the medial cuneiform and the base of the second metatarsal, which acts as a keystone for the midfoot arch. When these joints are injured, you get fracture-dislocations across the tarsometatarsal joints, leading to instability and midfoot pain.

For context, the other options refer to injuries in different locations: a Jones fracture is at the base of the fifth metatarsal in the foot, a Bennett fracture is at the base of the first metacarpal in the hand, and a Boxer's fracture is at the neck of the fifth metacarpal in the hand. None of those involve the midfoot tarsometatarsal joints.