[Dislocation of patella also a symptom of other diseases or consequence of local primary alteration of the scelet (author's transl)].

According to a large group of patients there is demonstrated the "symptomatic" dislocation of patella. It is a part of a system-disease, especially Onycho-osteo-arthro-dysplasia. Arthrogryposis multiplex. Freeman-Sheldon-syndrome, mongolism and children with debility or imbecility. There are discussed their pathogenesis and any consequences for diagnosis and treatment.