W.J.M. van de Ven, J.P.M. Sedelaar, M.M.G. van der Leest, C.A. Hulsbergen-van de Kaa, J.O. Barentsz, J.J.Fütterer & H.J. Huisman
OBJECTIVES: To determine transrectal ultrasound (TRUS) visibility of magnetic resonance (MR) lesions.
METHODS: Data from 34 patients with 56 MR lesions and prostatectomy were used. Five observers localized and determined TRUS visibility during retrospective fusion. Visibility was correlated to Prostate Imaging-Reporting and Data System (PIRADS) and Gleason scores.
RESULTS: TRUS visibility occurred in 43% of all MR lesions and in 62% of PIRADS 5 lesions. Visible lesions had a significantly lower localization variability. On prostatectomy, 58% of the TRUS-visible lesions had a Gleason 4 or 5 component.
CONCLUSIONS: Almost half of the MR lesions were visible on TRUS. TRUS-visible lesions were more aggressive than TRUS-invisible lesions.