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Related Experiment Video

Updated: Jun 14, 2026

In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses

In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses

Published on: March 30, 2015

Kidney tumor location measurement using the C index method.

Matthew N Simmons¹, Christina B Ching, Mary K Samplaski

¹Department of Urological Oncology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA. simmonm2@ccf.org

The Journal of Urology

|March 20, 2010

Summary

A new centrality index quantifies kidney tumor proximity to the renal sinus. This method aids surgical planning and reporting for nephron sparing surgery, correlating with operative complexity.

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Area of Science:

Urology
Radiology
Surgical Oncology

Background:

Accurate kidney tumor location is crucial for nephron sparing surgery.
Quantifying tumor proximity to the renal central sinus aids surgical planning and reporting.

Purpose of the Study:

To describe and validate a method for quantifying kidney tumor centrality.
To assess the correlation of tumor centrality with surgical parameters and complication rates.

Main Methods:

A centrality index was calculated using computerized tomography (CT) images in 133 patients.
The index was derived from tumor and kidney dimensions using the Pythagorean theorem.
Correlation with operative parameters and interobserver variability were assessed.

Main Results:

The centrality index effectively measures tumor proximity to the renal sinus.
Higher centrality index values correlated with increased warm ischemia time, indicating greater technical complexity.
High interobserver correlation (>93%) was achieved after a learning curve of approximately 14 cases.

Conclusions:

The centrality index offers a clinically valuable, quantitative measure of tumor location.
This scoring system can enhance the assessment and reporting of kidney tumors for surgical management.