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Two hundred eight patients with non-tumoral congenital hydrocephalus underwent CSF shunting below the age of one month. Ultrasonography was the most frequently utilized tool; hydrocephalus was recognized during pregnancy in 52% of the cases. Hydrocephalus was associated with myelomeningocele in 97 infants; in 38 subjects ventricular dilation was secondary to aqueductal stenosis. Post-hemorrhagic and post-infective hydrocephalus accounted for only 20 and 13 cases respectively. At the follow-up observation, a normal psychomotor development was recorded in 67.3% of the cases. Seventeen patients died. CSF infection was the most common cause of death (41%); in 6 patients the exitus was determined by the natural evolution of congenital associated malformations. Shunt revision did not influence the morbidity and the mortality significantly. On the other hand, CSF infections appeared to influence the prognosis negatively. In our experience, the prognosis of hydrocephalus operated on in the first month of life does not differ from that of hydrocephalus operated on late in life.