Wagner D, et al. - Using 3D statistical models, researchers studied the sacral bone mass in patients presenting with a fragility fractures of the sacrum (FFS). The fracture location in the sacral ala could be explained by the extensive area of negative Hounsfield units (HU). To enhance the strength of fracture fixation, the use of trans-sacral implants or augmented iliosacral screws was advocated by the low HU in the sacral bodies. In the fractured ala, the increased HU could be explained by fracture-asssociated hemorrhage. It can be used as a diagnostic tool.