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Variants of chromosome 9 with additional euchromatic bands: Two case reports

✍ Scribed by Reddy, Kavita S.

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 307 KB
Volume: 64
Category: Article
ISSN: 0148-7299
DOI: 10.1002/(sici)1096-8628(19960906)64:4<536::aid-ajmg2>3.0.co;2-n

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✦ Synopsis

This paper documents a prenatal case of maternally inherited subtle duplication of chromosome 9 bands q21.1 to q21.2 and a second case with two G-bands within the 9qh region. Cytogenetic studies of these cases included G-banding, C-banding, fluorescent in situ hybridization (FISH) using chromosome 9 specific library probe, and the classical satellite probe. In both patients, the additional bands were G-bands and C-band negative. By FISH studies they were negative for the satellite heterochromatin probe and positive for the chromosome 9 painting probe. Therefore, the extra bands were presumably euchromatin and part of chromosome 9. The chromosome 9 variants and their possible mechanisms of origin are discussed. o 1996 Wiley-Liss, Inc.

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