Two infants with trisomy involving chromosome 9 are described. One had complete trisomy 9 and the other karyotype 47,XX,+der(9),t(7;9) (p22;q32)mat. A trisomy 9 syndrome is delineated, consisting of features of the trisomy 9p syndrome and various other malformations. These include abnormalities of t
Non-mosaic partial tetrasomy and partial trisomy 9
β Scribed by Shapiro, Steven D. ;Hansen, Kathryn L. ;Littlefield, Christine A. ;Opitz, John M. ;Reynolds, James F.
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 366 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0148-7299
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π SIMILAR VOLUMES
The clinical features consisting mainly of enophthalmos, beaked nose, narrow palpebral fissures, receding chin, long fingers and toes, typical for chromsomal syndrome or partial trisomy 9q, were confirmed in a new case.
Gaps in the first ribs were observed in two children, one with partial and the other with mosaic trisomy for chromosome 8. The sign may be considered in conjunction with other features as a relative indication for chromosomal studies.
Two unrelated patients with a strikingly similar phenotype (low birth weight and poor thriving; mental retardation; dolichocephaly; beaked nose; deeply set eyes; prominent maxilla and receding small chin; long fingers with a peculiar clench) were partially trisomic for two different segments of 9q.
Tetrasomy of the short(p) arm of chromosome 9 has been reported in few cases. Most of these children present with microbrachycephaly, wide forehead, hypertelorism, lowset, malformed ears, beaked noses, and micrognathia. Additional anomalies include short neck, congenital heart disease, genital abnor