[Karyotype-phenotype correlation in a child with an idic (Yp)].

An 8-year-old boy with hypospadias and a 45,X/46,X,idic(Yp) karyotype is described. This chromosome abnormality possibly originated in an early zygote. It is concluded that: a) phenotypic variability in patients with an idic(Yp) probably results from an unequal tissular distribution of the different clones, and (b) deletion of Yq in the present case was distal to the stature determinants.