The results obtained in 151 children who underwent C.T. scan at the Pediatric Department of the University of Padova are reported. The high incidence of negative or aspecific results in the cases of static encephalopathy, in primary generalized epilepsy and in acute diffuse cerebral infectious process is emphasized. C.T. confirmed its high diagnostic value in tuberous sclerosis and cerebral abscess. While non providing the precise diagnosis it may be helpful in some demyelinating diseases. In secondary generalized epilepsy and in partial epilepsy C.T. scan may suggest the prognosis and a possible surgical approach. On the basis of these results and of other published reports a greater selectivity in the use of C.T. is strongly recommended.