Perirenal Retroperitoneal Hemorrhage on POCUS Elderly male with hypotension/abd pain. Perihepatic window shown. Diagnosis? Answer: Patient has retroperitoneal fluid seen. Has small amount of fluid in perirenal space but large amount of fluid in anterior pararenal space. Can where fluid is located in retroperitoneal space help you potentially determine etiology? Labeled Schematic: https://twitter.com/RJonesSonoEM/st #Perirenal #Retroperitoneal #Hemorrhage #Hematoma #POCUS #Clinical #ultrasound