Ellis-van Creveld (EvC) syndrome, or chondroectodermal dysplasia, is a rare genetic disorder associated with chondrodysplasia, ectodermal dysplasia, polydactyly, and congenital cardiac malformations. The disorder is due to an autosomal-recessive mutation mapped to chromosome 4p16. It may occur with different phenotypes. The case of an ovarian endometriotic cyst in a patient suffering from EvC syndrome is reported.