A series of 137 patients with amoebic liver abscess has been studied. Recognition of clearly defined but diverse clinical syndromes was found to be necessary not only in diagnosis but also in planned surgical management. The majority of patients had the classic syndrome of fever, right abdominal or chest pain, hepatomegaly, hepatic tenderness and radiological abnormalities. Other syndromes of presentation included the silent abscess, acute amoebic colitis, the acute abdomen, the intraabdominal lump, the external sinus, pyrexia of obscure origin, obstructive jaundice and renal, pleuro-pulmonary and cardiac symptoms. The syndromes due to an abscess in different parts of the right lobe and in the left lobe of the liver are to some extent distinct. In spite of the varied modes of presentation of amoebic liver abscess, the key to diagnosis is an understanding of the chronological sequence of the disease and its progression from one syndrome to another. Diagnostic methods of value and the mortality are discussed.

Amoebic liver pus has an acidic pH. Hence the pleural aspirate from an amoebic empyema due to rupture of an amoebic liver abscess has an acidic pH. In contrast, the pH of pleural aspirates from effusions and empyema of non-amoebic aetiology were noted to have an alkaline pH. The clinical significance of these observations is discussed.

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