Fig. 1.

Focal lesion seen on transrectal ultrasound (TRUS) and prostate magnetic resonance imaging in a 55-year-old man. (A) TRUS shows low echoic nodular lesion in left peripheral zone (arrow). TRUS guided biopsy for this lesion confirmed that the lesion was prostate cancer. (B) T2 weighted axial magnetic resonance scan shows relatively well defined nodular lesion in left peripheral zone (arrow). (C) Apparent diffusion coefficient map shows signal drop at the same lesion, which suggest diffusion restriction (arrow).