Editing Upper Urinary Tract Trauma (section)

===== Findings =====
*'''<span style="color:#ff0000">CT findings suspicious for significant renal injury include (6):''' 
*# '''<span style="color:#ff0000">Medial laceration'''
*# '''<span style="color:#ff0000">Medial hematoma (vascular pedicle injury)'''
*# '''<span style="color:#ff0000">Medial urinary extravasation (renal pelvis or ureteropelvic junction injury)'''
*# '''<span style="color:#ff0000">Hematoma > 3.5cm'''
*# '''<span style="color:#ff0000">Lack of contrast enhancement of the parenchyma (main renal arterial injury)'''
*# '''<span style="color:#ff0000">Active intravascular contrast extravasation (arterial injury with brisk bleeding)'''
[[File:Leftrenalarteryinjury.png|center|thumb|600x600px|Axial CT scan with contrast, red arrow showing left renal artery injury with extravasation. [[commons:File:Leftrenalarteryinjury.png|Source]]]] 

* '''<span style="color:#ff0000">Differential diagnosis of fluid collections seen on serial imaging for renal trauma (3):'''

# '''<span style="color:#ff0000">Hematoma''' - density is almost always > 30 HU
# '''<span style="color:#ff0000">Urinoma''' - density ranges from 0-20 Hounsfield units (HU)
# '''<span style="color:#ff0000">Abscess''' - associated with rim enhancement; perinephric abscess rarely occurs after renal injury