sentences:  The syndrome was first reported in 1987 in two sisters who had similar craniofacial abnormalities, Dandy-Walker phenotype, and congenital heart abnormalities.Neither of the parents was affected, indicating that the disorder was transmitted in an autosomal recessive pattern.The syndrome's symptoms were further refined in 1989 when the third case of the syndrome was reported, with similar craniofacial abnormalities to the first two cases, ventricular septal defect, and enlargement of the cisterna magna and fourth ventricle of the brain.