Myhre syndrome is a rare disorder characterized by mental retardation, dysmorphic facial features, including microcephaly, midface hypoplasia, prognathism, and blepharophimosis, typical skeletal anomalies, including short stature, square body shape, broad ribs, iliac hypoplasia, brachydactyly, flattened vertebrae, and thickened calvaria, and cardiovascular defects with a striking fibroproliferative response to surgical intervention. All reported cases have been sporadic. [From OMIM]