Genu valgum

Genu valgum

Musculoskeletal system

Other disorders

Key Takeaways

Genu valgum, more commonly known as "knock-knee" deformity, is a condition that causes the knees to bend inward and touch one another when the legs are straightened. People with severe valgus are unable to touch their feet when their knees are straightened. Causes include congenital, vitamin D deficiency like in rickets, arthritis, and others.