Genu valgum collapse is best described as:

• A. Lateral knee collapse during squat
• B. Medial knee collapse during squat or landing
• C. No knee movement, stiff knee
• D. Valgus stress test positive on laxity

Answer: (B)

Dynamic knee valgus is the idea here: during weight-bearing activities like squatting or landing, the knee moves inward toward the midline. Genu valgum collapse is best described by medial knee collapse during squat or landing because the knee tracks medially under load, reflecting a valgus alignment. If the knee collapsed laterally, that would be a varus movement, not valgus. A stiff knee with no movement isn’t describing a collapse, and a positive valgus stress test refers to ligament laxity on a static test rather than the dynamic knee alignment during movement.