Brief clinical report: interstitial deletion of the long arm of chromosome 10: del(10)(q11.2q21).

A de novo interstitial deletion of part of the long arm of chromosome 10 [del(10)(q11.2q21)] was identified by GTG (G-bands by trypsin using Giemsa) banding in a 9-year-old girl with mental retardation and minor anomalies. Only one other case of a similar deletion has been reported [Ray et al, 1980] and the phenotypic findings of the two cases are compared.