[Radioulnar synostosis as characteristic feature of chromosome aberrations (author's transl)].

: Among 13 patients with congenital proximal radioulnar synostosis the chromosomal analysis revealed a 47, XXY-constellation in an 8 years old boy and a 47, XXX-syndrome in a 12-year-old girl. The investigations show, that the congenital radio-ulnar synostosis may be combined with the chromosome aberration more often than it was commonly thought.