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What is an adnexal mass?

An adnexal mass is a lump in tissue near the uterus, usually in the ovary or fallopian tube. Adnexal masses include ovarian cysts, ectopic (tubal) pregnancies, and benign (not cancer) or malignant (cancer) tumors.

This answer is based on source information from the National Cancer Institute.

Kevin W. Windom, MD
OBGYN (Obstetrics & Gynecology)

An adnexal mass is a "catch all phrase" for any abnormality in the pelvic area outside of the uterus. The most common adnexal masses are ovarian cysts. Ovarian cysts can be caused by benign simple cysts that occur after ovulation, or benign ovarian tumors, or ovarian cancers. The fallopian tubes are also part of the adnexa and they can have infections that cause a mass or also could have fluid filled in the fallopian tubes called a hydrosalpinx. Hydrosalpinx can present as an adnexal mass and could cause pain. The fallopian tubes are also the most common place for an ectopic (tubal) pregnancy. This can be a life-threatening event and needs immediate medical attention. Some fibroids arising from the uterus can appear as adnexal masses on an ultrasound exam.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.