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Angiomyolipoma of the liver: an unusual benign tumour identifiable on cytological material

A 49-year-old Asiatic woman was admitted to our hospital for pulmonary oedema attributed to a congestive cardiomyopathy. Among the laboratory findings, abnormal hepatic enzymes were noted: aspartate aminotransferase (AST), 99 U/l (N<25 U/l); alanine aminotransferase (ALT), 136 U/l (N<32 U/l); and gamma GT, 126 U/l (N<45 U/l). An upper abdominal ultrasound led to the discovery of a hyperechoic mass of 6 cm diameter in the right lobe of the liver. The presence of this lesion was confirmed by a contrastenhanced spiral computed tomography (CT) examination showing a heterogeneous and hyperdense tumour, changing to hypodense at the late phase, 10 min after contrast material injection. At magnetic resonance imaging (MRI), the tumour was predominantly hypointense on T1 and hyperintense on T2 weighted spin-echo images. On the basis of the cytological and histological reports, the mass was not removed.