P10.04: A case report of congenital CMV infection mimicking Dandy-Walker syndrome by prenatal ultrasonography

Cytomegalovirus (CMV) is the most common cause of intrauterine infection, affecting 0.3-2% of liveborn infants. Given that congenital CMV infection is a relatively common cause of sensorineural hearing loss (SNHL) and mental retardation, its antenatal diagnosis and prevention is a major challenge in perinatology. Perinatal infection may be suspected from abnormalities seen with sonography or magnetic resonance imaging (MRI). Findings include microcephaly, ventriculonmegaly, cerebral calcification, ascites, hepatomegaly, splenomegaly, hyperechoic bowel, hyprops, and oligohydramnios. But, findings by imaging studies are too variable to be used as diagnostic tool. In this report, we present a case of CMV infection which prenatal ultrasonographic findings revealed partial absence of cerebellar vermis mimicking Dandy-Walker syndrome.