Neurodevelopmental and Behavioral Abnormalities Associated With Deletion of Chromosome 9p
ABSTRACT We report a child with craniosynostosis, partial absence of the corpus callosum, developmental delay, precocious puberty, and deletion of chromosome 9(p12p13,3). A review of the literature did not reveal any previous combination of the same kind. Craniosynostosis and partial absence of the corpus callosum, separately or in conjunction, may be part of the spectrum of malformations in the chromosome 9p deletion syndrome, and its presence, in combination with other known features, should prompt a search for this particular deletion as part of the differential diagnosis.
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- "[del9(p12p13.3)]  have been reported in association with precocious puberty. Here, we report a girl with distal 9p deletion with idiopathic central precocious puberty and mental impairment. "
ABSTRACT: We report a girl with a de novo distal deletion of 9p affected by idiopathic central precocious puberty and intellectual disability. Genome-wide array-CGH revealed a terminal deletion of about 11 Mb, allowing to define her karyotype as 46; XX, del(9)(p23-pter). To our knowledge, this is the second reported case of precocious puberty associated with 9p distal deletion. A third case associates precocious puberty with a more proximal 9p deletion del(9)(p12p13,3). In our case, more than 40 genes were encompassed in the deleted region, among which, DMRT1 which is gonad-specific and has a sexually dimorphic expression pattern and ERMP1 which is required in rats for the organization of somatic cells and oocytes into discrete follicular structures. Although we cannot exclude that precocious puberty in our del(9p) patient is a coincidental finding, the report of the other two patients with 9p deletions and precocious puberty indeed suggests a causative relationship.07/2013; 2013(1):978087. DOI:10.1155/2013/978087
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- "A child with craniosynostosis , partial absence of the corpus callosum, developmental delay, precocious puberty and deletion of chromosome 9(p12p13.3) has also been reported (Eshel et al., 2002). In addition, a locus associated with obsessive-compulsive disorder has been mapped to 9p24 (Willour et al., 2004). "
ABSTRACT: Deletions of distal chromosome 9p24 are often associated with 46,XY gonadal dysgenesis and, depending on the extent of the deletion, the monosomy 9p syndrome. We have previously noted that some cases of 46,XY gonadal dysgenesis carry a 9p deletion and exhibit behavioural problems consistent with autistic spectrum disorder. These cases had a small terminal deletion of 9p with limited or no somatic anomalies that are characteristic of the monosomy 9p syndrome. Here, we present a new case of 46,XY partial gonadal dysgenesis and autistic spectrum disorder associated with a de novo deletion of 9p24 that was detected by ultra-high resolution oligo microarray comparative genomic hybridization. The deletion included the candidate sex-determining genes in the region DMRT1 and DMRT3. These data suggest that a gene responsible for autistic spectrum disorder is located within 9p24. It remains to be determined if the gonadal dysgenesis and autistic spectrum disorder are caused by a single gene or if they are caused by distinct genetic entities at 9p24.Molecular Human Reproduction 10/2007; 13(9):685-9. DOI:10.1093/molehr/gam045 · 3.75 Impact Factor
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ABSTRACT: Craniosynostosis is a very heterogeneous group of disorders, in the etiology of which genetics play an important role. Chromosomal alterations are important causative mechanisms of the syndromic forms of craniosynostosis accounting for at least 10% of the cases. Mutations in 7 genes are unequivocally associated with mendelian forms of syndromic craniosynostosis: FGFR1, FGFR2, FGFR3, TWIST1, EFNB1, MSX2 and RAB23. Mutations in 4 other genes, FBN1, POR, TGFBR1 and TGFBR2, are also associated with craniosynostosis, but not causing the major clinical feature of the phenotype or with an apparently low penetrance. The identification of these genes represented a great advance in the dissection of the genetics of craniosynostosis in the last 15 years, and today they explain the etiology of about 30% of the syndromic cases. The paucity in the identification of genes associated with this defect has partly been due to the rarity of familial cases. In contrast, very little is known about the molecular and cellular factors leading to nonsyndromic forms of craniosynostosis. Revealing the molecular pathology of craniosynostosis is also of great value for diagnosis, prognosis and genetic counseling. This chapter will review (1) the chromosomal regions associated with syndromic forms of the malformation, (2) the genes in which a large number of mutations have been reported by independent studies (FGFR1, FGFR2, FGFR3, TWIST1 and EFNB1) and (3) the molecular mechanisms and genotype-phenotype correlations of such mutations.Frontiers of oral biology 02/2008; 12:107-43. DOI:10.1159/0000115035