Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Endometrioma
Medically reviewed by Min Clinic Staff | Updated: January 2026
Endometrioma: : Part of the condition known as endometriosis. Endometrioma is a type of cyst formed when endometrial tissue (the mucous membrane that makes up the inner layer of the uterine wall) grows in the ovaries. It affects women during the reproductive years and may cause chronic pelvic pain associated with menstruation.
Endometriosis is the presence of endometrial glands and tissue outside the uterus.
Women with endometriosis may have problems with fertility.
Endometrioid cysts, often filled with dark, reddish-brown blood, may range in size from 0.75-8 inches.
Endometrioma is also referred to as an endometrioid cyst.