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Ring Chromosome 18: A Case Report
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Shermineh Heydari1   , Fahimeh Hassanzadeh1 , Mohammad Hassanzadeh Nazarabadi 2 |
1- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
2- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. , NazarabadiM@mums.ac.ir |
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Abstract: (9170 Views) |
| Ring chromosomes are rare chromosomal disorders that usually appear to occur de novo. A ring chromosome forms when due to deletion both ends of chromosome fuse with each other. Depending on the amount of chromosomal deletion, the clinical manifestations may be different. So, ring 18 syndrome is characterized by severe mental growth retardation as well as microcephaly, brain and ocular malformations, hypotonia and other skeletal abnormalities. Here we report a 2.5 years old patient with a cleft lip, club foot, mental retardation and cryptorchidism. Chromosomal analysis on the basis of G-banding technique was performed following patient referral to the cytogenetic laboratory. Chromosomal investigation appeared as 46, XY, r(18) (p11.32 q21.32). According to the clinical features of such patients, chromosome investigation is strongly recommended. |
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| Keywords: Ring chromosome 18, karyotyping, mental retardation |
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Full-Text [PDF 72 kb]
(3901 Downloads)
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Type of Study: Case Report |
Subject:
Genetics & Disease
Received: 2014/08/21 | Accepted: 2014/09/9 | Published: 2014/09/17
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