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Jacobs 1990 Risk of Malignancy Index (RMI) Calculator
x402
Jacobs 1990 Risk of Malignancy Index (RMI) Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Computes the Jacobs 1990 Risk of Malignancy Index (RMI = U × M × CA125) for ovarian mass evaluation and flags if RMI exceeds the 200 threshold.
Price / call$0.005
Success—
StatusUnknown
How this service works
Jacobs 1990 risk of malignancy index: RMI = U × M × CA125 (U/ml). Caller assigns ultrasound_score 0, 1, or 3 (never 2) and postmenopausal (M=3 if true, else 1). Returns rmi to 1 decimal and exceeds_200 (true if RMI > 200). Not an ovarian-cancer diagnosis and not later RMI-2 or RMI-3.
Output
Returns the computed RMI value rounded to one decimal place (RMI = ultrasound_score × menopausal_multiplier × CA125) and a boolean field exceeds_200 indicating whether the RMI surpasses the clinically significant 200 threshold.
Example use cases
Gynecologic oncology triage decision
“My patient has a CA125 of 210 U/ml, her ultrasound shows bilateral lesions and ascites so the ultrasound score is 3, and she is postmenopausal — what is her Jacobs RMI and does it cross the 200 threshold?”
Premenopausal low-risk mass screening
“Can you work out the RMI for a premenopausal patient whose CA125 is 22 U/ml and who has just one ultrasound feature, so ultrasound score 1?”
Borderline CA125 with no ultrasound features
“Run the Jacobs 1990 risk of malignancy index for a postmenopausal woman with a CA125 of 50 U/ml and an ultrasound score of 0 — is her RMI above 200?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/rmiWhen to prefer
Use this endpoint when you need a fast, standards-compliant implementation of the original Jacobs 1990 RMI formula specifically. Prefer it over manual calculation to avoid rounding errors and ultrasound-score misassignment. Note this implements the classic RMI-1 only — not RMI-2 (Tingulstad 1996) or RMI-3 (Tingulstad 1999) — so choose accordingly when the clinical protocol specifies which version to use.
Side effects
- Invalid ultrasound_score value (only 0, 1, or 3 accepted — value 2 is not valid per Jacobs 1990)
- CA125 value out of supported range (0–50000 U/ml)
- Missing required query parameters (ca125_u_ml, ultrasound_score, postmenopausal)
- Payment failure or x402 authorization error resulting in 402 response
- Non-numeric CA125 input causing schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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