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Hematuria Cancer Risk Score with Ultrasound Informs Cystoscopy Use in Patients with Hematuria.

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The Hematuria Cancer Risk Score (HCRS) combined with renal bladder ultrasound (RBUS) effectively identifies patients needing cystoscopy for hematuria. This approach safely spares 25% of patients from the invasive procedure, reducing healthcare costs.

Keywords:
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Area of Science:

  • Urology
  • Oncology
  • Diagnostic Imaging

Background:

  • Hematuria is a key indicator of urinary tract cancer, necessitating further investigation.
  • Early detection of urinary tract cancers is crucial for effective patient outcomes.

Purpose of the Study:

  • To evaluate the efficacy of renal bladder ultrasound (RBUS) and the Hematuria Cancer Risk Score (HCRS) in guiding cystoscopy decisions for patients presenting with hematuria.
  • To determine if RBUS and HCRS can accurately identify patients who require cystoscopy, thereby optimizing resource allocation.

Main Methods:

  • A development cohort of 1984 patients with hematuria underwent RBUS across 40 UK hospitals.
  • An independent validation cohort of 500 patients with suspected bladder cancer was analyzed.
  • Sensitivity and true negative rates of HCRS and RBUS were assessed to determine diagnostic accuracy.

Main Results:

  • The Hematuria Cancer Risk Score demonstrated good discrimination in the validation cohort, with an area under the ROC curve of 0.727 and 95% sensitivity for cancer detection.
  • Combining HCRS with RBUS in the development cohort suggested that 34% of patients could avoid cystoscopy, with a 97% sensitivity for cancer detection in the validation cohort.
  • This combined approach allowed 25% of patients to safely omit cystoscopy, missing only one case of G1 Ta bladder cancer.

Conclusions:

  • The HCRS in conjunction with RBUS provides a reliable method for triaging patients with hematuria.
  • This strategy effectively identifies individuals who would benefit from cystoscopy, while safely sparing others from this invasive procedure.
  • The integration of HCRS and RBUS can lead to significant healthcare cost savings by reducing unnecessary cystoscopies.