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Please use this identifier to cite or link to this item: https://scholars.lib.ntu.edu.tw/handle/123456789/456424
Title: Low penetrance of retinoblastoma for p.V654L mutation of the RB1 gene
Authors: Hung C.-C
SHIN-YU LIN 
CHIEN-NAN LEE 
Chen C.-P
Lin S.-P
Chao M.-C
Chiou S.-S
Su Y.-N.
Issue Date: 2011
Journal Volume: 12
Source: BMC medical genetics
Abstract: 
Background: Retinoblastoma is caused by compound heterozygosity or homozygosity of retinoblastoma gene (RB1) mutations. In germline retinoblastoma, mutations in the RB1 gene predispose individuals to increased cancer risks during development. These mutations segregate as autosomal dominant traits with high penetrance (90%).Methods: We screened 30 family members from one family using high resolution melting assay and DNA direct sequencing for mutations in the RB1 gene. We evaluate the phenotype and penetrance of germline mutations of the RB1 gene in a large Taiwanese family.Results: The molecular analysis and clinical details of this family showed phenotypic variability associated with the p.V654L mutation in exon 19 of the RB1 gene in 11 family members. The phenotype varied from asymptomatic to presence of a unilateral tumor. Only four individuals (2 males and 2 females) developed unilateral retinoblastoma, which resulted in calculated low penetrance of 36% (4/11). The four individuals with retinoblastoma were diagnosed before the age of three years. None of their relatives exhibited variable severity or bilateral retinoblastoma.Conclusions: The diseased-eye ratio for this family was 0.36, which is lower than current estimates. This suggests that the RB1 p.V654L mutation is a typical mutation associated with low penetrance. ? 2011 Hung et al; licensee BioMed Central Ltd.
URI: https://scholars.lib.ntu.edu.tw/handle/123456789/456424
ISSN: 1471-2350
DOI: 10.1186/1471-2350-12-76
SDG/Keyword: adolescent; article; cancer genetics; child; clinical article; DNA sequence; female; gene mutation; genetic screening; germ line; human; male; molecular biology; nucleotide sequence; pedigree; penetrance; phenotype; phenotypic variation; retinoblastoma; Taiwan; genetics; missense mutation; phenotype; retinoblastoma; retinoblastoma protein; DNA Mutational Analysis; Female; Humans; Male; Mutation, Missense; Pedigree; Penetrance; Phenotype; Retinoblastoma; Retinoblastoma Protein; Taiwan
[SDGs]SDG3
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