Risk of Malignancy Index (RMI, Adnexal Mass) — free guideline decision tool
Estimate malignancy risk of an adnexal mass with the Risk of Malignancy Index (RMI).
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Common questions
What does Risk of Malignancy Index (RMI, Adnexal Mass) do?
Triage adnexal masses and decide on gynecologic-oncology referral.
How is the result calculated?
RMI = ultrasound score U × menopausal status M × CA-125. RMI 1: U = 0/1/3, M = 1/3; RMI 2: U = 1/1/4, M = 1/4. ≥ 200 = elevated risk.
Is this a substitute for clinical judgement?
No. All results are decision-support only, for licensed clinicians. They must be individualized to the whole patient and the latest guideline version.
Run Risk of Malignancy Index (RMI, Adnexal Mass) now
Estimate malignancy risk of an adnexal mass with the Risk of Malignancy Index (RMI).
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.