What are the characteristic CT findings of congenital cytomegalovirus (CMV) infection in the central nervous system, and how do they differ from other congenital infections?

The most common CT finding in congenital CMV infection is periventricular calcification. Unlike congenital toxoplasmosis, CMV does not typically present with calcifications in the basal ganglia or cortices. Other key features may include ventriculomegaly and cortical malformations. Clinically, congenital CMV can present with microcephaly, sensorineural hearing loss, and developmental delay. A common pitfall is confusing CMV with other TORCH infections, so careful attention to calcification patterns is crucial.