Monitoring of Congenital Malformations in Tottori, 1974–1983*

The prevalence and distribution of the congenital malformed infants and the neurocutaneous syndrome patients who were born in Tottori Prefecture, Japan between 1974 and 1983 were reported. The average prevalence of 581 cases with congenital malformations at birth was 1.21 per 100 births (live and stillbirths), which was similar to other populations in Japan. The prevalence values of cleft lip, cleft palate and cleft palate with cleft lip in Tottori was somewhat higher than in Kanagawa and Osaka districts. Frequencies of tuberous sclerosis, Sturge-Weber syndrome and neurofibromatosis in live births were about 1:22,000,1:65,000 and 1:2,200, respectively. These data in Japanese population were considered to be about the same as those reported in Caucasian populations.