Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
The purpose of our study was to prospectively evaluate whether MRI before an initial transrectal ultrasound-guided biopsy contributed to detection of prostate cancer in patients with high prostate-specific antigen (PSA) level and no previous biopsy.
Men with an abnormal digital rectal examination or high PSA level were enrolled in this prospective randomized study. Participants were randomly allocated into two groups; the MRI group underwent 3-T MRI and then a transrectal ultrasound-guided biopsy with knowledge of the cancer location. The non-MRI group did not undergo MRI before transrectal ultrasound-guided biopsy. The cancer detection rate and positive core rate were obtained to compare the MRI and non-MRI groups.
The MRI and non-MRI groups contained 44 and 41 patients, respectively. There was no significant difference between the two groups with respect to age, PSA, and prostate volume. The MRI group (13/44, 29.5%) had a significantly higher cancer detection rate than the non-MRI group (4/41, 9.8%) (p = 0.03). The MRI group (52/527, 9.9%) had a significantly higher positive core rate than the non-MRI group (11/432, 2.5%) (p = 0.00). Regarding cancer detection rate and positive core rate, odds ratios were 3.9 (95% CI, 1.1-13.1) and 4.2 (95% CI, 2.2-8.1), respectively.
In patients with PSA level and no previous biopsy, 3-T MRI that is performed before transrectal ultrasound-guided biopsy may contribute to the detection of prostate cancer.
Written by:
Park BK, Park JW, Park SY, Kim CK, Lee HM, Jeon SS, Seo SI, Jeong BC, Choi HY. Are you the author?
Reference: AJR Am J Roentgenol. 2011 Nov;197(5):W876-81.
doi: 10.2214/AJR.11.6829
PubMed Abstract
PMID: 22021535
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