Jaundice in pregnancy.

The occurrence of hepatobiliary disease with or without jaundice during pregnancy provides both the hepatologist and obstetrician with an interesting and urgent diagnostic challenge. Advances in our understanding and management of liver disorders unique to pregnancy and hepatobiliary disease in general have resulted in a significant improvement in the outcome for both mother and fetus. Certain disorders such as acute fatty liver of pregnancy and hepatic haemorrhage associated with toxaemia should be considered medical emergencies and delay in diagnosis of these conditions will probably adversely affect maternal and fetal outcome. A careful clinical history, physical examination, appropriate laboratory tests and radiological investigations should allow a diagnosis within 24-48 hours of presentation. Liver biopsy is rarely required. A careful history may provide important information. Does the patient have pre-existent liver disease? Has there been contact with hepatitis, intravenous drug abuse or any other factor predisposing to acute viral hepatitis? Does the patient have a family history of pruritus and/or jaundice to suggest intrahepatic cholestasis of pregnancy? Is the patient's alcohol consumption excessive? Has the patient received any hepatotoxic medications? Has there been abdominal pain and/or fever to suggest gallstones, hepatic bleeding or acute fatty liver of pregnancy? Laboratory investigations may give valuable diagnostic clues. Marked aminotransferase elevation would suggest acute viral or 'ischaemic' hepatitis. Haematological features of microangiopathic haemolysis would point towards toxaemia or AFLP. Hepatitis A and B serological tests may be helpful in viral liver disease. Radiological investigations may be indicated depending on the clinical context. Abdominal ultrasonography may be useful in the diagnosis of gallstones, biliary obstruction, liver tumours or intrahepatic bleeding. Fatty infiltration of the liver may be diagnosed by ultrasonography but computed tomography (CT) of the abdomen is probably more reliable for a diagnosis of acute fatty liver of pregnancy as it allows measurement of liver density which is typically reduced by fatty infiltration. CT scanning is also probably more valuable than ultrasound in assessing the extent of capsular rupture and haemorrhage into the liver and peritoneal cavity.