Duplication of exon 7-12 in the low-density lipoprotein receptor gene in three Danish patients with familial hypercholesterolemia

Familial hypercholesterolemia (FH) is one of the most frequent single-gene disorders; nevertheless, it is commonly underdiagnosed and undertreated. To increase the number of individuals diagnosed and treated for FH, an ongoing discovery of novel FH mutations is necessary as a prerequisite to implement good nationwide genetic FH screening strategies. Here we report on the finding of a seldom exon 7-12 duplication in the low-density lipoprotein receptor gene of three Danish patients with FH.