Here, we report substitution of one base-pair in exon 1 of MLH3 (c.1397C>A) and a frameshift mutation in exon 19 of MLH1 (c.2250_2251ins AA) in a 43-year-old Chinese male with an LS pedigree.
We identified an MSH6 mutation (c.10C>T, p.Gln4*) causing Lynch syndrome (LS) in 11 French Canadian (FC) families from the Canadian province of Quebec.
Comprehensive analysis of the mismatch repair genes associated with Lynch syndrome revealed a germline hMSH6 missense mutation 2314C>T (arg772trp) and normal sequencing for hMSH2 and hMLH1.
In this study, we show segregation of the putative pathogenic MSH6 missense mutation c.1346T>Cp.Leu449Pro with microsatellite instability-high Lynch syndrome-related tumours lacking MSH6 expression in a large 17th century pedigree.