Inferior Vena Cava (IVC) Wall Invasion Risk Calculator

This tool calculates the predicted probability of IVC wall invasion in patients with renal cell carcinoma and IVC tumor thrombus, based on a multiparametric MRI prediction model. Model derived from: "Preoperative MRI Model for Predicting Inferior Vena Cava Wall Invasion in Renal Cell Carcinoma with Tumor Thrombus".

Instructions: Based on preoperative MRI findings, select or enter the status of the four predictors below. The predicted probability will be calculated and displayed in real-time.
1. Associated Bland Thrombus
2. Lumbar Vein Diameter
3. Ipsilateral Renal Vein Ostium Diameter
4. Thrombus Craniocaudal Length

Prediction Result

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Please complete all selections above to calculate prediction probability.

Model formula: logit(P) = -1.988 + 1.201×X₁ + 0.972×X₂ + 1.291×X₃ + 1.123×X₄

About This Model

This calculator is based on a logistic regression model with variables coded as: present/above cutoff = 1, otherwise = 0. Predicted probability P = elogit(P) / (1 + elogit(P)). This tool is intended to assist in preoperative planning and does not replace comprehensive clinical judgment.

When citing this tool, please also cite the associated research publication.

Research & Development

[Dr. xxx/Affiliation: xxx]

Version 1.0 | Last Updated: January,2026