====== Psoas abscess ====== [[Psoas]] (or iliopsoas) abscess is a collection of pus in the iliopsoas muscle compartment ((Mallick IH, Thoufeeq MH, Rajendran TP. Iliopsoas abscesses. Postgrad Med J 2004; 80:459.)). ===== Associated Conditions ===== see [[Secondary psoas abscess]].