Psoas Abscess

Psoas (or iliopsoas) abscess is a collection of pus in the iliopsoas muscle compartment [1]. It may arise via contiguous spread from adjacent structures or by the hematogenous route from a distant site.

What causes a psoas abscess?

A primary psoas abscess can occur in individuals with diabetes mellitus, AIDS, kidney failure, immunosuppression, or intravenous drug use. A secondary psoas abscess can be caused by the spread of infection from gastrointestinal diseases such as appendicitis, Crohn disease, diverticulitis, or perforated colon carcinoma.

Psoas abscess is an uncommon cause of acute low back pain that is associated with high morbidity and mortality. The onset of symptoms is frequently insidious and the clinical presentation vague.