SUMMARY We report on a patient with systemic lupus erythematosus (SLE) who suffered catastrophic haemorrhage following rupture of an intrahepatic aneurysm. The association between hepatic artery aneurysm and SLE has not been recorded previously, but we have found evidence from the literature that there may be an association between autoaggressive disorders and this surgical emergency.Aneurysm of the hepatic artery is not common. When intrahepatic, it is associated with systemic disorders. In this report we describe a patient with systemic lupus erythematosus in whom rupture of an intrahepatic artery aneurysm occurred and led to ife-threatening haemorrhage.Case report An Asian women of 33 presented in 1965 with arthritis and joint swelling. She was anaemic and pyrexial with thinning head hair and pubic hair. A diagnosis of systemic lupus erythematosus (SLE) was made on the basis of marked anaemia, thrombocytopenia, a raised erythrocyte sedimentation rate, raised plasma gammaglobulins, and a positive LE cell preparation. The patient responded to treatment with 6-mercaptopurine and betamethasone.Ten years later she was admitted to hospital with arthralgia, pleuritic chest pain, and dependent oedema. X-rays showed bilateral pleural effusions, and an electrocardiogram suggested pericarditis. Further investigations showed antinuclear antibody (positive to 1/50) and raised DNA binding, confirming the diagnosis of SLE. Renal involvement produced proteinuria and diminished function (creatinine clearance 34 ml/min). Frusemide 120 mg with dexamethasone 4 mg was prescribed daily.