Abstract
Over the past 200 years subphrenic abscess first evolved from being a clinical entity that was nearly always fatal into an acute illness following perforation of a viscus which could often be cured by surgery, and over the past 30 years it has changed again so that currently its usual presentation is insidious and in the majority of cases apparently localized to the chest. This last phase is a consequence of the widespread postoperative use of antibiotics and corticosteroids.