Disease of children. Perthes disease in acute phase affects children usually 3-12 years with peak at 5-7 yrs. More common in boys. 3.5:1.Decreased blood supply to femoral head causes fracture and deformity. Phases of fragmentation and fattening of femoral head when recovered can leave deformity. Adults who had problem as child can have arthritis from residual deformity.Sometimes hip replacements are necessary.
Legg-Calve-Perthes. Legg-calve-perthes disease is a childhood condition associated with an inadequate blood supple to part of the hip joint. Without adequate blood flow, a process can occur in which the bone becomes unstable, and may break and heal poorly. This disease typically affects one hip, but sometimes in develops in both hips. It is most common among boys 2-12, although any age can be affected.