[Observation of the so-called "anti-Chiari effect" subsequent to osteotomy of the pelvis in children (author's transl)].

Osteotomy of the pelvis according to Chiari is performed in the immediate vicinity of the acetabulum and the craniolateral corner of the acetabulum. In children, it will almost always involve damaging the important growth zones of the acetabulum. Depending on the site and extent of the osteotomy performed, the pathological growth kinetics will lead to varying defects. This pathology of the kinetics of growth is known as "Anti-Chiari effect".