The first compound heterozygosity for HKalpha alpha allele and Southeast Asian deletion allele.
BACKGROUND
In one program of newborn screening to detect deletional alpha-thalassemia with microarray, the microarray result of a 10-month-old girl showed that she was positive for the rightward deletion junction fragment, the Southeast Asian deletion junction fragment and alpha2.


METHODS
The girl and her parents were subjected to haematological and molecular analysis.


RESULTS
The haematological data revealed that the family presented a typical alpha-thalassemic trait. The molecular analysis showed that the girl and her mother were compound heterozygosity for HKalpha alpha allele and Southeast Asian deletion allele, and her father is compound heterozygosity for alpha alpha allele and Southeast Asian deletion allele.


CONCLUSIONS
We have detected a hitherto unreported compound heterozygosity for HKalpha alpha allele and Southeast Asian deletion allele. This case will provide some clinical implications for PCR-based diagnosis for deletional alpha-thalassemia.
Li
Zesong
Z
College of Bioengineering, Chongqing University, Chongqing 400044, People's Republic of China. lzssc@yahoo.com
Cai
Shaoxi
S
Rong
Kabin
K
Song
Guanbin
G
Li
Yuan
Y
Guo
Ruijun
R
D000328:Adult; D002681:China; D005192:Family Health; D005260:Female; D006455:Hemoglobins, Abnormal / Q000235:genetics*; D006579:Heterozygote; D006801:Humans; D007223:Infant; D019656:Loss of Heterozygosity; D008297:Male; D016133:Polymerase Chain Reaction; D017085:alpha-Thalassemia / Q000235:genetics*
D006455:Hemoglobins, Abnormal