A Case of Mosaic Ring Chromosome 4 with Subtelomeric 4p Deletion.
10.3343/kjlm.2009.29.1.77
- Author:
Jeong Hyun KIM
1
;
Phil Soo OH
;
Hye Yeon NA
;
Sun Hee KIM
;
Hyoun Chan CHO
Author Information
1. Department of Laboratory Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
- Publication Type:Case Report ; English Abstract
- Keywords:
r(4) chromosome;
Mosaic ring chromosome;
Short stature
- MeSH:
*Chromosome Deletion;
*Chromosomes, Human, Pair 4;
Growth Disorders/*diagnosis/genetics;
Humans;
In Situ Hybridization, Fluorescence;
Infant;
Karyotyping;
Male;
*Ring Chromosomes;
Telomere
- From:The Korean Journal of Laboratory Medicine
2009;29(1):77-81
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Ring chromosome is a structural abnormality that is thought to be the result of fusion and breakage in the short and long arms of chromosome. Wolf-Hirschhorn syndrome (WHS) is a well-known congenital anomaly in the ring chromosome 4 with a partial deletion of the distal short arm. Here we report a 10-month-old male of mosaic ring chromosome 4 with the chief complaint of severe short stature. He showed the height of -4 standard deviation, subtle hypothyroidism and mild atrial septal defect/ventricular septal defect, and also a mild language developmental delay was suspected. Brain magnetic resonance imaging showed multifocal leukomalacia. Chromosomal analysis of the peripheral blood showed the mosaic karyotype with [46,XY,r(4)(p16q35)[84]/45,XY,-4[9]/91,XXYY, dic r(4;4)(p16q35;p16q35)[5]/46,XY,dic r(4;4)(p16q35;p16q35)[2]]. FISH study showed the deletion of the 4p subtelomeric region with the intact 4q subtelomeric and WHS region. Both paternal and maternal karyotypes were normal. We compared the phenotypic variation with the previously reported cases of ring chromosome 4. The ring chromosome 4 with the subtelomeric deletion of short arm seems to be related with the phenotype of short stature.
