Keywords:
Cancer, Biopsy, MR, CT, Genital / Reproductive system male, Oncology, Abdomen
Authors:
P. Vivian, S. Dupre; QLD/AU
DOI:
10.1594/ranzcr2016/R-0059
Purpose
Multi-parametric MRI of the prostate performed in the setting of elevated PSA is becoming routine practice to diagnose and stage primary prostate carcinoma.
MRI is used to direct transrectal ultrasound-guided (TRUS) prostate biopsy and in some cases MRI-guided targeted biopsy.
CT has previously been considered to have virtually no role in the diagnosis of prostate cancer due to poor definition of intraprostatatic anatomy and is currently reserved for staging of distant metastases.(1) At our institution we have anecdotally observed that suspicious prostate lesions detected on MRI (PI-RADS 4 & 5 - see fig.1) are often visible as a focal dense/enhancing lesion on contrast enhanced CT performed for subsequent staging of prostate cancer.
Despite this observation there has been little recent research to investigate the correlation between MRI and CT findings.(2) The purpose of this study was to determine if primary prostate cancer diagnosed on MRI was also visible on routine staging CT of the abdomen/pelvis.