Premature Ovarian Failure Caused by a Heterozygous Missense Mutation in <b><i>POF1B</i></b> and a Reciprocal Translocation 46,X,t(X;3)(q21.1;q21.3)

In a patient affected by premature ovarian failure, a reciprocal translocation between chromosomes X and 3 and an additional heterozygous missense mutation in the X-linked gene POF1B were detected. Homozygosity for POF1B mutations is well-known to be associated with premature ovarian failure. In this case, the rare combination of skewed X inactivation due to the reciprocal translocation involving one X chromosome and heterozygosity for a known POF1B mutation explains the phenotype.