[The so-called "intact" side in Perthes' disease].

Out of the 32 patients treated with Perthes' disease in the Orthopaedic Department of the University Medical School, PECS, in 9 cases bilateral course has been observed. Out of 23 children with Perthes' disease and unilateral, typical course the authors have observed in 12 patients pathological X-ray signs on the "intact" side--which were more distinct on the epiphyseal center, but chiefly on the growth intervertebral disk and on the metaphysis. In the same time, no subjective complaints and no other objective clinical symptoms pointed to Perthes' disease. It is supposed by the authors that transient ischaemic state may occur also on the side classified as "intact", but with reversible consequences, thus, the alterations of the epiphyseal center do not display the typical course of the Perthes' disease.