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Partial trisomy 4q due to familial 2/4 translocation

✍ Scribed by B. Biederman; P. Bowen

Publisher: Springer
Year: 1976
Tongue: English
Weight: 953 KB
Volume: 33
Category: Article
ISSN: 0340-6717
DOI: 10.1007/bf00281888

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✦ Synopsis

The case of a 5-year-old boy with partial trisomy for the long arm of chromosome No. 4 is described. The pattern of abnormal development in this and in 12 previously reported cases is similar, but the phenotype is not as characteristic as that associated with some other types of chromosomal imbalance. The most consistent features are: growth and mental retardation, small head with narrow forehead, short philtrum, relatively large ears with incomplete differentiation of the pinnae, cryptorchidism, oedema of the hands and/or feet, and renal anomalies. Abnormal development of the thumb was present in 4 of 13 cases. Eleven of the 13 families had balanced translocation carriers whose future offspring would be at increased risk for a mental retardation syndrome.

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