[Inversion 8 and consecutive trisomy of region 8q22----qter].

A girl with severe mental retardation and conspicuous phenotype features is described. The chromosomal aberration consists of a partial trisomy 8q of the region 8q22----qter. Minor deletion of the terminal part of the region 8p23 must be presumed, resulting in partial monosomy of this region. Inversion of chromosome 8 was found in the father and his mother.