Table 1: Diagnostic classification of retroperitoneal hematoma.


Zone I—midline retroperitoneumExtends from the aortic hiatus to the sacral promontory and is divided into supramesocolic and inframesocolic zonesAll injuries require surgical exploration

Zone II—lateral retroperitoneumExtends on either side from the renal hila to the pericolic gutters
Avoid exploration in blunt trauma
Explore all penetrating trauma

Zone III—pelvic retroperitoneumSacral promontory and encompasses the pelvis
Explore all penetrating trauma
Explore for expanding hematoma in penetrating trauma