A de novo interstitial tandem duplication of 6p12p21.3 was observed in a 7-month-old boy with growth retardation, psychomotor delay and craniofacial, brain, limb, and genital anomalies. Fluorescent in situ hybridization using a chromosome 6 paint probe demonstrated that the extra material belonged t
?Essentially pure? partial trisomy (6)(p23?pter) in two brothers due to maternal t(6;17)(p23;p13.3)
✍ Scribed by R�thlisberger, Benno; Kotzot, Dieter; Gnehm, Hanspeter E.; Schinzel, Albert
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 42 KB
- Volume
- 85
- Category
- Article
- ISSN
- 0148-7299
- DOI
- 10.1002/(sici)1096-8628(19990806)85:4<389::aid-ajmg16>3.0.co;2-a
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✦ Synopsis
We report on two brothers with low birth weight, growth retardation, microcephaly, minor facial anomalies, mental retardation, and trisomy (6)(p23→pter) due to a maternal t(6;17)(p23;p13.3). As demonstrated by fluorescent in situ hybridisation (FISH) with the Miller-Dieker cosmid probe (D17S379) and with a subtelomeric probe (D17S34) the additional deletion on 17p13 is very small, and therefore, the phenotype of these two boys is most likely the result of essentially pure partial trisomy 6p. Comparison of the clinical findings with those of ten cases from the literature of dup(6p) with a breakpoint in or more distal to 6p23 allows delineation of a specific phenotype of dup(6)(p23→pter) characterized by low birth weight, growth retardation, microcephaly, and blepharo-
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