Confirmation of trisomy 22 by trypsin-giemsa staining.

Abstract
A small-for-date male infant with mental retardation, microcephaly, malformed ears, preauricular sinuses, epicanthal folds, micrognathia, congenital heart disease, micropenis and micropolygyria of the parietal and occipital lobes of the cerebral cortex was shown to have a 47,XX,+22 karyotype by trypsin-Giemsa banding.