EORTC Bladder Cancer Recurrence and Progression Calculator

Written by Great Medico

Updated September 24, 2026 •2 min read

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Bladder-cancer recurrence and progression are influenced by pathology, tumor burden, and treatment. The EORTC Bladder Cancer Recurrence and Progression Calculator makes the historical point-table estimate in this plugin explicit.

What this calculator does

EORTC Bladder Cancer Recurrence and Progression Calculator uses Number of tumors, Tumor diameter, Prior recurrence rate, Stage of the disease, Concomitant CIS, and Tumor grade to calculate EORTC bladder-cancer recurrence and progression scores. It is built around the exact fields displayed in this plugin rather than a generic version of the topic. Where supported, it also shows Recurrence at 1 year, Recurrence at 5 years, and Progression points so the primary result is easier to place in context. This is a historical non–muscle-invasive bladder-cancer risk model. Its recurrence and progression estimates depend on the tumor features entered and should be interpreted with current pathology and treatment context, not as a kidney-function calculation.

How to use it

Enter or select Number of tumors, Tumor diameter, Prior recurrence rate, Stage of the disease, Concomitant CIS, and Tumor grade. Use the units offered by the calculator and choose the option that matches the actual clinical or timing situation. Check date entries and laboratory units before relying on the output. For paired blood, urine, or dialysis measurements, use samples and treatment data from the same collection or clinical episode when the formula requires it.

How the calculation works

The tool sums the EORTC component points for number of tumors, tumor diameter, prior recurrence rate, stage, concomitant CIS, and grade. It separately derives recurrence and progression point totals, then maps those totals to the fixed 1-year and 5-year recurrence/progression percentages encoded in the EORTC tables.

Example

Using the sample values prefilled in this calculator, the primary result is 0 recurrence points (EORTC bladder-cancer score), Recurrence at 1 year is 15%, and Recurrence at 5 years is 31%. This worked example shows how the plugin’s own default inputs flow through the implemented method; replace them with the correct patient, laboratory, imaging, or personal values before interpreting a result.

How to interpret the result

The calculator reports separate recurrence and progression point totals with the fixed 1-year and 5-year percentages encoded in its EORTC tables. Use them as historical NMIBC risk-stratification estimates, not as an individualized prediction independent of current pathology and treatment.

Limitations and notes

EORTC tables were derived from historical non–muscle-invasive bladder-cancer cohorts and may overestimate risk in patients receiving contemporary BCG or other modern management. Pathology quality, re-resection, molecular features, treatment, and updated EAU/AUA risk groups can change prognosis.