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[Epidemiologic study of carcinoma in situ of the cervix].
During the period from 1950 to 1983, 1633 patients with cervical carcinoma in situ (CIS) were treated at the Cancer Institute Hospital, Tokyo. These cases were retrospectively investigated to determine the relation between the epidemiologic features and social phenomena. The number of patients with CIS tends to increase year by year. The incidence of CIS tends to be larger in the younger age group. Delay in the age of primiparity, a lower incidence of multiparas and a higher incidence of artificial abortion were seen in the CIS patients. Recurrence was seen in 0.4% of the CIS patients, and the recurrence site was most frequently the vaginal stump.
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