The epithelium which calls itself original squamous epithelium has the layer of the cell and coming at the same time like 15-20 levels of Baumkuchen, and, in the department place which uterine cervix touches it with in a vagina, a cell is covered with the original squamous epithelium which became flat on the surface so as to be near if near.
It is covered to an epithelium consisting of one level called a cylinder epithelium secreting viscous liquid to the cervical duct part which was slightly in the womb for ze.
You can confirm the boundary line of these two places of epitheliums definitely and are called flat cylinder epithelium border (Squamo-Columer junction).
When it is often that this flatness cylinder epithelium border becomes the target from a foreign enemy, and inflammation is easy to become cause by bacteria or a virus, and it is, and some kind of carcinogenesis factors affect the cellular tissue which resembled original squamous epithelium by a process of the restoration when a cylinder epithelium is made to be damaged at this variation stage, the affected cell is in a condition of the ex-cancer which calls itself a heteroplasia epithelium.
When this state is worse more, you become the uterine cervix cancer.
That is why more than 90% of the uterine cervix cancer are squamous cancer, and it is the gladular cancer which slight remainder 10% develops than a cylinder epithelium controlling the secretion of the viscous liquid.
