Gartland classification is used for pediatric supracondylar humerus fractures. This system groups elbow injuries in children by how far the distal fragment is displaced and whether the posterior cortex remains, which helps decide treatment—from simple immobilization to surgical reduction and pinning. It specifically describes fractures at the distal humerus just above the elbow, the most common pediatric elbow fracture. The other options involve different bones or areas (thigh bone, radiocapitellar area, or distal humeral metaphysis) and are not described by the Gartland scheme.

Midfoot instability from disruption of the tarsometatarsal joints is called a Lisfranc injury. This injury involves the joints where the bases of the metatarsals meet the tarsal bones, and it can be purely ligamentous or include fracture-dislocations. The second metatarsal base often acts as a keystone, so disruption can cause the midfoot to widen or the metatarsals to become misaligned with the tarsal framework. Recognizing it is crucial because instability in this region can be easily missed on initial imaging yet lead to chronic pain and arthritis if not treated. Mechanistically, a planted foot subjected to an axial load or rotational force commonly produces this pattern. Look for radiographic clues like widening between the first and second metatarsal bases, misalignment of the tarsometatarsal joints, or a fleck sign from Lisfranc ligament avulsion. Other terms refer to different areas or patterns: a Chopart injury involves hindfoot joints (talonavicular and calcaneocuboid), a dislocation at the tarsometatarsal joints is a component of a Lisfranc injury but the broad, widely used label is Lisfranc injury, and a fracture at the base of the fifth metatarsal is a different injury altogether.

Lisfranc injuries disrupt the tarsometatarsal joint complex in the midfoot—the joints where the bases of the metatarsals articulate with the tarsal bones (medial, intermediate cunei and cuboid). This midfoot joint complex is stabilized by strong ligaments, including the Lisfranc ligament between the second metatarsal base and the medial cuneiform, and various interosseous and dorsal ligaments. When these joints are injured, the forefoot can separate from the midfoot, causing instability and pain. This is distinct from the first metatarsophalangeal joint (the big toe joint), the ankle mortise (tibia-talus), or the subtalar joints (talus-calcanus), which are not the Lisfranc joint complex.

Focus on recognizing potential deep venous thrombosis (DVT) from the presentation and risk factors. Localized deep calf pain in a patient with long airplane travel, smoking, and estrogen-containing oral contraceptives raises strong suspicion for DVT, which can be a medical emergency due to the risk of pulmonary embolism. The screening exam commonly taught for DVT in this setting is a provocative test that involves dorsiflexing the ankle to stress the calf and detect pain or discomfort associated with a clot in the deep veins. A positive finding would prompt urgent imaging (like duplex ultrasound) and further evaluation. The other tests target different problems: a knee ligament test, a forefoot nerve-related test, and a test used to assess effort or malingering. Those do not address the suspected DVT in this scenario, making the DVT-focused examination the best choice here.