Risk of Malignancy Index (RMI) Calculator

Estimate malignancy risk in ovarian masses.

Dr. Taimoor Asghar
Medically reviewed by Dr. Taimoor Asghar, MBBS Last updated:

Risk of Malignancy Index Form

Menopausal Status
Ultrasound Score (U)1pt each for: multilocular cyst, solid areas, metastases, ascites, bilateral lesions.
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Understanding Your Results

The Risk of Malignancy Index (RMI) combines CA-125, menopausal status, and ultrasound features. RMI ≥ 200 (pre-menopausal) or ≥ 250 (post-menopausal) suggests high risk of ovarian malignancy.

Frequently Asked Questions

What is the Risk of Malignancy Index?

RMI combines menopausal status, ultrasound morphology, and serum CA-125 to estimate the risk of ovarian cancer before surgery.

What RMI score is considered high risk?

An RMI above 200 is generally considered high risk and warrants referral to a gynecologic oncologist.

Can RMI be used for all ovarian masses?

It is most validated for adnexal masses in postmenopausal women, though it is commonly used across age groups.

Is CA-125 always elevated in ovarian cancer?

No. Some ovarian cancers do not raise CA-125, and benign conditions can elevate it. RMI improves accuracy by adding imaging and menopausal status.

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