%0 Case Reports %T First Infertile Case with CSTF2TGene Mutation. %A Gorukmez O %A Gorukmez O %J Mol Syndromol %V 11 %N 4 %D Nov 2020 %M 33224017 %F 1.494 %R 10.1159/000509686 %X Male infertility is multifactorial and presents with heterogeneous phenotypic features. Genetic factors are responsible for up to 15% of the male infertility cases. Loss of the Cstf2t gene in male mice results in infertility. No disease-associated mutations have been described for this gene in infertile men. Here, we report a patient diagnosed with infertility in whom a homozygous nonsense mutation in the CSTF2T gene was detected by clinical exome sequencing. This case is the first description of an infertile patient who has a homozygous CSTF2T mutation.