Genetic investigations identified a pathogenic variant (NM_002667.5, c.116T>G or p.Leu39*, heterozygous) in the PLN gene in 11 probands (Pt 1.1, Pt 2.1, Pt 3.1, Pt 4.1, Pt 5.1, Pt 6.1, Pt 7.1, Pt 8.1, Pt 9.1, Pt 10.1, Pt 11.1) representing 9/189 (4.8%) patients tested for HCM and 2/62 (3.2%) patients tested for DCM. Here, PLN is linked to familial dilated cardiomyopathy.