Undiagnosed renal abscess presenting as acute bacterial peritonitis: case report.

A case of undiagnosed renal abscess complicated by intraperitoneal rupture with generalised bacterial peritonitis is presented. Prompt surgical intervention was essential for saving the patient's life. Early imaging of the kidney in unresolved renal infection is essential if renal abscess, its delayed presentation and complications are to be avoided. Most patients will be cured without operation by antibiotics and if necessary, by additional percutaneous drainage where an abscess has formed.