Example of Endometrial Hyperplasia

Description

Centered in the pelvis, the uterus is rendered with a conspicuously thickened endometrium (stratum functionale and basale) lining the uterine cavity, contrasting with the surrounding myometrium and the outer perimetrium. Inferiorly, the endocervical canal continues into the vagina, with the cervix positioned caudal to the uterine body and anterior to the posterior vaginal wall. Laterally, the uterine fundus transitions into the uterine tubes (tubae uterinae), which course toward the ovaries; the ovaries sit posterolateral to the uterus near the fimbrial ends. Endometrial hyperplasia is the morphologic correlate of prolonged estrogenic stimulation without adequate progestational opposition, and this thickened uterine lining is the key teaching point when linking abnormal uterine bleeding to endometrial sampling. The distinction between diffuse glandular crowding and background stroma, while histologic at diagnosis, starts with an anatomic concept: excess mucosa reduces the relative volume of the uterine cavity and can appear as a globally thickened endometrium on transvaginal ultrasound, prompting biopsy to exclude endometrioid carcinoma. Risk framing matters here, from anovulatory cycles and polycystic ovary syndrome to exogenous estrogen and tamoxifen exposure. Clinical decision-making often turns on it. Use this artwork for reproductive anatomy blocks, gynecologic pathology lectures, or figures accompanying guidelines on evaluation of postmenopausal bleeding, endometrial thickness thresholds, hysteroscopy, dilation and curettage, and progestin therapy (including levonorgestrel intrauterine systems). A clean fit for patient education handouts that explain why a thickened uterine lining triggers endometrial biopsy. Anatomical accuracy verified by SciePro's Medical Advisory Board.