Preferred Label : hyperattenuating crescent sign;
Definition : Crescent-shape found along posterior wall of abdominal aorta on CT scan of higher
attenuation than luminal blood. Indicates impending rupture of abdominal aortic aneurysm
as blood penetrates thrombus or arterial wall.;
Source : Radiology 1999; 211:37-38;
Origin ID : RID35289;
Associated condition(s)
Crescent-shape found along posterior wall of abdominal aorta on CT scan of higher
attenuation than luminal blood. Indicates impending rupture of abdominal aortic aneurysm
as blood penetrates thrombus or arterial wall.
