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Related Experiment Videos

MR imaging of bladder neoplasms: correlation with pathologic staging.

N J Tavares1, B E Demas, H Hricak

  • 1Department of Radiology, University of California, School of Medicine, San Francisco.

Urologic Radiology
|January 1, 1990
PubMed
Summary

Magnetic resonance (MR) imaging accurately stages bladder carcinoma local extent. This study found MR imaging highly sensitive and specific for detecting tumor invasion and extravesical spread, aiding surgical planning.

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Area of Science:

  • Radiology
  • Oncology
  • Urology

Background:

  • Accurate staging of bladder carcinoma is crucial for treatment planning.
  • Magnetic resonance (MR) imaging is a key modality for evaluating local disease extent.

Purpose of the Study:

  • To assess the accuracy of MR imaging in determining the local extent of primary or recurrent bladder carcinoma.
  • To evaluate MR imaging's performance in staging bladder cancer according to the TNM system.

Main Methods:

  • Retrospective analysis of 34 MR imaging examinations in 29 patients with bladder carcinoma.
  • Comparison of MR imaging findings with surgical and pathologic evaluations within 30 days.
  • Radiologists interpreted MR images unaware of clinical or pathologic findings.

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Main Results:

  • MR imaging correctly staged tumor invasion depth in 85% of cases.
  • High sensitivity (97%) and accuracy (94%) for detecting deep muscle invasion.
  • Excellent accuracy (97%) for extravesical tumor extension (95% sensitivity, 100% specificity).
  • Moderate accuracy (82%) for pelvic lymph node metastases (50% sensitivity, 100% specificity).

Conclusions:

  • MR imaging is a valuable tool for assessing local disease extent in bladder carcinoma.
  • The findings support the use of MR imaging in pre-operative evaluation, especially for locally advanced disease.