Legg-Calve-Perthes disease

Alternative names:

coxa plana; Legg-Perthes disease; Perthes disease

Symptoms:

• knee pain (may be the only symptom, initially)
• persistent thigh pain
• atrophy of muscles in the upper thigh
• slight shortening of the leg or legs of unequal length (asymmetry)
• hip stiffness restricting movement in the hip
• difficulty walking (gait difficulty), limp with walking
• limited range of motion

Signs and tests:

A physical examination shows decreased hip motion, and a hip X-ray or pelvis X-ray is consistent with Legg-Calve-Perthes disease.