Cancer of the Uterine Cervix

Cancer of the cervix uteri and vitamin A

“…This is consistent with the recent finding that the apparent protective effect of dietary vitamin A against cancer of the lung is practically limited to the squamous cell type (Kvale et al, 1983). As the great majority of cervical cancers are squamous cell in origin (Raphael & Waterman, 1951) and are thought to be preceded by squamous metaplasia (Johnson, 1969), the cervix would seem to be a promising site in which to investigate the role of vitamin A. Studies in Italy (La Vecchia et al, 1984), Japan (Hirayama, 1979), and the USA (Marshall et al, 1983;Romney et al, 1981) (Orr et al, 1985), while the other two studies showed no differences that were statistically significant (Bernstein & Harris, 1984;Lambert et al, 1985).…”

Early Detection of Cancer: An Overview

“…Squamous cell cancer accounts for 85% to 90% of all invasive cervical cancers and it is on this tumor that screening efforts focus (91). Cervical cancer can be classified as invasive or in situ, according to whether or not there is stromal invasion by the tumor.…”

Early Detection Of Cancer: An Overview

“…To examine the incidence of cervical cancer in a popUlation requires a brief discussion of the natural history of this tumor. Squamous cell cancer accounts for 85% to 90% of all invasive cervical cancers and it is on this tumor that screening efforts focus (91). Cervical cancer can be classified as invasive or in situ, according to whether or not there is stromal invasion by the tumor.…”