Lipohemarthrosis of the knee: Imaging on plain radiography and computerized tomography

An anteroposterior view of the left knee (A) shows a depressed fracture of the lateral tibial plateau (arrow). A tunnel view of the left knee (B), shows a vertical component of the fracture (arrow). A cross table lateral view (C) shows a fat-fluid level (arrow). An axial image from a CT scan (D) at a level above the knee confirms a fat-fluid level (arrow) with a low-density fat containing supernatant and blood layering posteriorly. These findings are consistent with a lipohemarthrosis secondary to a tibial fracture.