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RMI (Risk of Malignancy Index)
Clinical Context & Background
The Risk of Malignancy Index (RMI I) is a widely used algorithm to assess the likelihood that an adnexal mass is malignant (ovarian cancer). It combines serum CA125, menopausal status, and ultrasound features. An RMI > 200 suggests high risk and referral to a gynecologic oncologist.
Formula Logic
RMI = U x M x CA125Reference Data
| RMI Score | Risk Prediction | Management |
|---|---|---|
| < 25 | Low Risk (<3%) | Conservative / General Gyn |
| 25 - 200 | Intermediate Risk (~20%) | Further imaging / Specialist review |
| > 200 | High Risk (>75%) | Referral to Gyn Oncologist |
Evidence-based oncology decision support. Verify with clinical guidelines.