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Rapid Detection of Recurrent Non-Muscle Invasive Bladder Cancer in Urine Using ATR-FTIR Technology.

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A new spectroscopic liquid biopsy method can detect non-muscle invasive bladder cancer (NMIBC) recurrence in urine. This rapid test offers a less invasive alternative to cystoscopy for early NMIBC identification.

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Area of Science:

  • Urology
  • Analytical Chemistry
  • Biomedical Engineering

Background:

  • Non-muscle invasive bladder cancer (NMIBC) represents 80% of bladder cancer cases.
  • High recurrence rates necessitate frequent, invasive cystoscopies for monitoring.
  • There is a need for non-invasive methods to improve NMIBC detection and reduce patient burden.

Purpose of the Study:

  • To develop and validate a rapid, spectroscopic liquid biopsy assay for NMIBC recurrence detection in urine.
  • To establish a less invasive diagnostic tool compared to traditional cystoscopy.

Main Methods:

  • Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy was used on urine samples from 62 NMIBC patients.
  • Spectral data underwent optimization via parameter grid searching and multivariate analysis.
  • Machine learning models were trained and tested, with performance evaluated using AUROC, sensitivity, and specificity.

Main Results:

  • A Regularized Random Forests (RRF) model achieved an AUROC of 0.92.
  • The RRF model demonstrated 86% sensitivity and 77% specificity in detecting NMIBC recurrence.
  • Spectroscopic analysis successfully differentiated between cancer-free and recurrent NMIBC cases.

Conclusions:

  • Spectroscopic liquid biopsy is a promising non-invasive technique for early NMIBC detection.
  • This method can aid in reducing the need for frequent, invasive cystoscopies.
  • Further development could lead to improved patient management and outcomes for NMIBC.