Small angiomyolipoma of the liver diagnosed by fine-needle aspiration biopsy under ultrasound guidance |
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Authors: | NOBUO YAMADA HARUHIDE SHINZAWA NAOHIKO MAKINO TAKAAKI MATSUHASHI SATOSHI ITASAKA TSUNEO TAKAHASHI SHIGEMI FUYAMA |
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Affiliation: | The Second Department of Internal Medicine;*The First Department of Pathology, Yamagata University School of Medicine, Yamagata, Japan |
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Abstract: | The first reported case of small hepatic angiomyolipoma to be diagnosed by fine-needle aspiration biopsy (FNAB) is described. A 53 year old man presented with a tumour in segment VI of the liver measuring 0.9 × 0.8 cm. The tumour was hyperechoic on ultrasound examination, showed relatively low density (+ 33 Hounsfield units) on computed tomography (CT), and was hypervascular on angiography. Computed tomography during arterial portography demonstrated a perfusion defect. Magnetic resonance imaging (MRI) revealed high intensity by both T1- and T2-weighted imaging. Diagnosis could not be obtained by these imaging modalities, but it was established successfully by FNAB under ultrasound guidance. Histologically, the tumour was an angiomyolipoma made up of three components: blood vessels, smooth muscle and fatty tissue. Surgery is unnecessary for this benign condition, and the patient has been followed up. Ten months later, the patient is currently doing well without growth of the hepatic angiomyolipoma. |
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Keywords: | angiomyolipoma diagnosis fine-needle aspiration biopsy liver |
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