Abstract
Summary The importance of differential chromosome stains despite an apparently normal routine chromosome analysis is emphasized by the studies presented here. Trypsin-Giemsa banding revealed a partial trisomy 7 in an 18-month-old girl with failure to thrive, slow development, and multiple physical anomalies. The father was found to be a balanced translocation carrier. Before amniocentesis could be carried out in a succeeding pregnancy, the mother aborted and the fetus was found to be partially monosomic for the No. 7 chromosome.
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