Angular deformities around the knee; Genu Varum (Bowing) or Genu Valgum (Knock Knees) are commonly seen as deformities in children. These can be physiological as well as pathological.

Perthes disease, also called Legg-Calvé-Perthes disease, is a rare condition of the hip that affects only children. It develops when there is a temporary loss of blood supply to the rounded head of the femur (thigh bone).