Partial monosomy 10p syndrome.

A 7 year-old girl is described with a de novo deletion of the short arm of chromosome 10 (qter p13:). The clinical features of: mental retardation, a large asymmetric head, antimongoloid slant, exophthalmos, epicanthus, ptosis, abnormal ears, pectus excavatum and widely spaced nipples are compared with those of five earlier reported cases with a deletion 10p. The data available suggest the existence of a clinically recognizable monosomy 10p syndrome.