Germline mutations in the base excision repair gene, MutY human homolog (MYH), have recently been associated with a recessively inherited multiple adenoma polyposis syndrome and colorectal cancer. The spectrum of extracolonic lesions is still being characterized, although preliminary reports suggest that bi-allelic mutation carriers may share some of the clinical features of other hereditary colon cancer syndromes. Of 225 endometrial cancer patients, we identified one individual as a compound heterozygote, carrying mutations Y165C and G382D of MYH, and five individuals with heterozygous defects (three G382D and two Y165C). The patient with the bi-allelic Y165C/G382D mutation also had a sebaceous carcinoma, a feature of Muir-Torre syndrome. Although several intronic polymorphisms were detected in the heterozygous carriers, no other pathogenic variants were identified. While not conclusive, this novel and interesting finding provides evidence that bi-allelic germline mutations in MYH may increase susceptibility to endometrial cancer.