Pyogenic liver abscess: new concepts of an old disease.

Early recognition of pyogenic liver abscess requires a high index of suspicion. The abrupt onset of hectic fevers and jaundice is rarely seen today; instead, an insidious progression of malaise, abdominal pain, and night sweats is more common. Biliary tract disease is the most frequent underlying disorder. An elevated alkaline phosphatase is a useful clue to the condition, but diagnosis depends on imaging of an abscess cavity followed by aspiration. Treatment involves antibiotics together with drainage, which can often be performed successfully by a nonsurgical percutaneous approach. However, prognosis continues to be poor unless the diagnosis is made promptly.