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O-RADS™ (Ultrasound)
Clinical Context & Background
O-RADS™ US provides a standardized lexicon and risk stratification system for ovarian and adnexal masses. It assigns a risk category (O-RADS 1-5) based on morphology, the "3mm rule" for solid components, and vascularity (Color Score), which guides clinical management (observation, MRI, or specialist referral).
Formula Logic
Algorithmic Decision Tree (Morphology → Size/Vascularity Modifiers)Reference Data
| Category | Risk of Malignancy | Management |
|---|---|---|
| O-RADS 1 | 0% | Physiologic (No follow-up) |
| O-RADS 2 | < 1% | Almost Certainly Benign (Surveillance) |
| O-RADS 3 | 1 - 10% | Low Risk (Gyn Specialist / MRI) |
| O-RADS 4 | 10 - 50% | Intermediate Risk (Gyn Onc / MRI) |
| O-RADS 5 | ≥ 50% | High Risk (Referral to Gyn Oncologist) |
Evidence-based oncology decision support. Verify with clinical guidelines.