PRI-MUS (prostate risk identification using micro-ultrasound) is an evidence-based protocol for identifying sonographic features of the prostate under micro-ultrasound to help direct and target biopsies.
SYSTEMATIC BIOPSY
PRI-MUS 1
Small regular ducts "Swiss Cheese"
PRI-MUS 2
Hyperechoic with/without ductal patches.
TARGET SUSPICIOUS REGION
PRI-MUS 3
Mild heterogeneity or Bright Echoes in hyperechoic tissue
PRI-MUS 4
Heterogeneous “Cauliflower”, “smudgy or mottled” or Bright Echoes (”Starry Sky”)
PRI-MUS 5
Irregular Shadowing or Mixed-echo lesions or Irregular Prostate/PZ border