[Epidemiologic background and changes in patients infected with human papilloma virus].
Contagion with certain types of HPV was supposed to have a causal relationship with cervical neoplasia of the uterus. The rate of prevalence of HPV was investigated in pre-cancer and cancer patients with uterine cervical smear using virapap or viratype. According to the cytologic classification, among those whose cytology was diagnosed as class I or II, were found a few positive HPV, however, in cases in classes cytology IIIa, III and IIIb, the positive rate turned out to be 22.5, 41 and 72.4%, respectively. About 65% of patients whose post-operative diagnosis was cervical carcinoma, had been found positive in the pre-operative HPV.DNA check up. The statistical profiles of virally infected subjects were regarded as slightly younger females with early onset of menarche. A higher positive rate was found in such groups such as unmarried single and divorced single women, career employees with special skills, housewives and dwellers in residential and commercial sections. The follow up study of HPV infection was checked with subjects with dysplasia, and no case was recognized in which initially HPV negative dysplasia turned to positive during the observation period. But, in about 50% of those checked, initially HPV positive dysplasia turned to negative, during the follow up period. In the cases with long term (more than 8 years) dysplasia which was followed up, only one out of 10 was found to be HPV positive, while in middle term (more than 2 years but less than 8 years) followed up dysplasia, the positive rate was calculated as 47.8%.
Ohta
M
M
Department of Gynecology, Aichi Cancer Center.
Casanova
H
H
Mizuno
K
K
Kaseki
H
H
Niwa
K
K
Ishiko
H
H
D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008875:Middle Aged; D027383:Papillomaviridae; D014412:Tumor Virus Infections / Q000453:epidemiology* / Q000503:physiopathology