Preferred Label : psoas sign;
Definition : Lateral margin of the psoas muscle, representing the interface between the muscle
and retroperitoneal fat, is absent on a radiograph. If present with abdominal trauma,
suggests retroperitoneal hemorrhage. If present with right lower quadrant pain, suggests
appendicitis. May also be normal; sign neither necessary nor sufficient to indicate
disease.;
Source : Eisenberg, Ronald L. Atlas of Signs in Radiology.;
Origin ID : RID35463;
Associated condition(s)
- Automatic exact mappings (from CISMeF team)
Lateral margin of the psoas muscle, representing the interface between the muscle
and retroperitoneal fat, is absent on a radiograph. If present with abdominal trauma,
suggests retroperitoneal hemorrhage. If present with right lower quadrant pain, suggests
appendicitis. May also be normal; sign neither necessary nor sufficient to indicate
disease.
