Endometrium tissue appearing outside the uterine cavity, most commonly on the ovaries, describes which condition?

• A. Fibroids
• B. Ovaries
• C. Endometriosis
• D. Pelvic inflammatory disease

Answer: (C)

Endometriosis is defined by the presence of endometrial glands and stroma outside the uterine cavity. It commonly implants on the ovaries, among other pelvic structures, and when it involves the ovaries it can form endometriomas (often called chocolate cysts) from recurrent bleeding. The ectopic endometrial tissue responds to menstrual cycle hormones, leading to cyclic pelvic pain, dysmenorrhea, dyspareunia, and sometimes infertility. The bleeding within these implants causes inflammation, scar tissue, and adhesions that amplify pain. This scenario is distinct from fibroids, which are uterine smooth muscle tumors causing heavy bleeding or mass effects within the uterus, and from pelvic inflammatory disease, which is an infectious process with pelvic pain and discharge. So, the described condition is endometriosis.