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BCG-induced granulomatous prostatitis: a comparative ultrasound and pathologic study
H Miyashita1, P Troncoso, R J Babaian
1Department of Urology, University of Texas M.D. Anderson Cancer Center, Houston.
Urology
|April 1, 1992
Summary
Ultrasound cannot distinguish bacillus Calmette-Guérin (BCG)-induced granulomatous prostatitis from prostate cancer. Baseline ultrasounds before BCG immunotherapy are recommended for future diagnosis.
Area of Science:
- Urology
- Medical Imaging
Background:
- Granulomatous prostatitis can be induced by bacillus Calmette-Guérin (BCG) immunotherapy.
- Distinguishing BCG-induced granulomatous prostatitis from prostate cancer is clinically significant.
Purpose of the Study:
- To compare ultrasound findings of BCG-induced granulomatous prostatitis with prostate cancer.
- To evaluate the diagnostic utility of ultrasonography in BCG-induced granulomatous prostatitis.
Main Methods:
- Analysis of ultrasound findings in 6 patients with BCG-induced granulomatous prostatitis.
- Histologic examination of whole-mount prostate cross-sections.
- Comparison of imaging features with known characteristics of prostate cancer.
Main Results:
- BCG-induced granulomatous prostatitis exhibited a hypoechoic pattern on ultrasound.
- Ultrasound findings included multifocality and peripheral zone location, mimicking prostate cancer.
- Ultrasonography could not reliably differentiate BCG-induced granulomatous prostatitis from prostate cancer.
Conclusions:
- BCG-induced granulomatous prostatitis shares ultrasonographic features with prostate cancer.
- Baseline prostate ultrasound prior to BCG immunotherapy is recommended.
- Baseline imaging may aid in the future clinical diagnosis of BCG-induced granulomatous prostatitis.