The prominent folds of endometrium in this uterus opened to reveal the endometrial cavity are an example of hyperplasia. Cells forming both the endometrial glands and the stroma have increased in number. As a result, the size of the endometrium has increased. This increase is physiologic with a normal menstrual cycle.

Question: What may the patient experience?

AnswerVaginal bleeding may occur when the hyperplastic endometrium breaks down, and in association with abnormal menstrual cycles.