De novo Ring Chromosome 6 in a Child with Multiple Congenital Anomalies

Ahmad, Ahzad Hadi and Ramli, Siti Fatimah and Tan, May Loong and Salahshourifar, Iman and Alwi, Zilfalil and Mohd Yusoff, Narazah (2010) De novo Ring Chromosome 6 in a Child with Multiple Congenital Anomalies. Kobe Journal of Medical Sciences, 56 (2). E79-E84. ISSN 0023-2513

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Abstract

Ring chromosome 6, especially if it is de novo, is a rare occurrence. The phenotype of patients with ring chromosome 6 can be highly variable ranging from almost normal to severe malformations and mental retardation. The size and structure of the ring chromosome as well as the level of mosaicism are important factors in determining the clinical phenotype. Here we report an eight month-old child, a product of a non consanguineous marriage, who presented with developmental retardation, hypertelorism, microcephaly, flat occiput, broad nasal bridge, large ears, micrognathia, wide spaced nipples, protruding umbilicus, short stubby fingers, clinodactyly, single palmar crease, short neck with no obvious webbing, and congenital heart defect. Conventional karyotyping and Whole Chromosome Paint of the peripheral leukocytes showed 46,XY,r(6)(p25q27) karyotype with plausible breakpoints at p25 and q27 end. Conventional karyotyping of both parents showed normal karyotype. To the best of our knowledge, this is the first report of a Malay individual with ring chromosome 6, and this report adds to the collective knowledge of this rare chromosome abnormality.

Item Type: Article
Subjects: Q Science > QH Natural history > QH426-470 Genetics
R Medicine > RC Internal medicine
Divisions: Institut Perubatan & Pergigian Termaju (Advanced Medical & Dental Institute) > Article
Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Perubatan (School of Medical Sciences) > Article
Zoom Profil Pakar (Expert Profile) > Dr. Ahzad Hadi Ahmad (Advanced Medical & Dental Institute)
Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Perubatan (School of Medical Sciences) > Pusat Genom Manusia (Human Genome Centre) > Article
Depositing User: Administrator Automasi
Date Deposited: 23 Oct 2017 09:14
Last Modified: 24 Oct 2017 05:06
URI: http://eprints.usm.my/id/eprint/37227

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