Two siblings with a previously undescribed syndrome are presented. They both have severe dwarfism, antenatal in origin, with generalized chondrodysplasia, severe microcephaly with cerebellar vermis hypoplasia, a hypoplastic iris and a papillous coloboma (Coloboma of the optic disc). The first sibling has a 46,XY karyotype despite normal female internal and external genitalia. She has moderate mental retardation. Gestation of the second sibling was interrupted after antenatal diagnosis. The fetus was 46,XX and very similar to the first case.