During a woman's menstrual cycle, the level and mixture of hormones released by the ovaries triggers changes in the endometrium.
Menstrual flow sloughs off part of the endometrium.
After each menstrual period, the endometrium grows to replace the part of the surface that has been lost. Adenocarcinomas Nearly all endometrial cancers are adenocarcinomas, cancers of glandular cells. There are several tyes of adenocarcinomas. This type accounts for about 75 percent of the adenocarcinomas that develop in the epithelium, or lining layer of the uterus. Different terms are used to describe whether glandular or squamous cells are involved, or both.