Korean J Urol.  2010 May;51(5):308-312.

The Role of Endorectal Magnetic Resonance Imaging in Predicting Extraprostatic Extension and Seminal Vesicle Invasion in Clinically Localized Prostate Cancer

• Park SY
• Kim JJ
• Kim TH
• Lim SH
• Han DH
• Park BK
• Kim CK
• Kwon GY
• Choi HY
• Lee HM

Abstract

PURPOSE
We aimed to assess the clinical value of endorectal magnetic resonance imaging (MRI) in predicting extraprostatic extension and seminal vesicle invasion in patients with clinically localized prostate cancer. MATERIALS AND METHODS: A total of 54 patients who underwent radical prostatectomy for clinically localized prostate cancer were retrospectively analyzed. The findings of endorectal MRI, performed at least 3 weeks after biopsy, were compared with the pathological results of radical prostatectomy specimens. The sensitivity, specificity, and accuracy of the detection of extraprostatic extension and seminal vesicle invasion were calculated. RESULTS: The sensitivity, specificity, and accuracy of the endorectal MRI findings were 50.0%, 82.6%, and 77.8% for the detection of extraprostatic extension, respectively, and 75.0%, 92.0%, and 90.7% for the detection of seminal vesicle invasion, respectively. The sensitivity of endorectal MRI in the detection of extraprostatic extension improved as the Gleason score increased. CONCLUSIONS: Endorectal MRI findings demonstrated modest sensitivity for predicting extraprostatic extension, whereas specificity was relatively high. In addition, endorectal MRI showed better sensitivity for detecting high-grade tumors.

Keyword

Magnetic resonance imaging; Neoplasm staging; Prostatic neoplasms

MeSH Terms

Biopsy
Humans
Magnetic Resonance Imaging
Magnetic Resonance Spectroscopy
Magnetics
Magnets
Neoplasm Grading
Neoplasm Staging
Prostate
Prostatectomy
Prostatic Neoplasms
Retrospective Studies
Seminal Vesicles
Sensitivity and Specificity