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Duplication within chromosome 5q characterized by fluorescence in situ hybridization

✍ Scribed by Mowat, David; Jauch, Anna; Robson, Lisa; Smith, Arabella

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
23 KB
Volume
83
Category
Article
ISSN
0148-7299
DOI
10.1002/(sici)1096-8628(19990423)83:5<361::aid-ajmg3>3.0.co;2-w

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✦ Synopsis

We present a 16-month-old boy with developmental delay, minor anomalies, small penis, and lymphedema of the upper limbs. Routine cytogenetic analysis suspected a duplication of 5q. Fluorescent in situ hybridization (FISH) with a cosmid probe (MCC at the 5q22 APC region) showed tandemly duplicated fluorescent signals on one of chromosomes 5, whereas FISH with three YAC probes (TYAC12 at 5q35, HTY3182 at 5q34, and TYAC139 at 5q31) did not give duplicated signals. These findings indicate a duplication of 5q22 band in one chromosome 5. The boy we describe here is the first case of a pure partial duplication of 5q to be proven by FISH techniques. A review of previously reported cases of putative partial 5q duplication showed no consistent phenotype. Am. J. Med. Genet. 83:361-364, 1999.

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