A 66-year-old woman reported intermittent right epigastric pain of 2 years’ duration. Sonography showed a hyperechoic nodule in the lower portion of her right hepatic lobe (segment 6). Computed tomography (CT) showed features of focal nodular hyperplasia (FNH). Magnetic resonance imaging (MRI) could not distinguish between hepatocellular carcinoma (HCC) and FNH. Serum alpha-fetoprotein and carcinoembryonic antigen levels were unremarkable (3.9 ng/dl and 1.1 ng/dl, respectively). Liver scintigraphy showed a photopenic area in the corresponding site seen on the radiologic examinations. Histologic analysis indicated HCC with cirrhosis. FNH is a benign condition, but HCC is a fatal malignant disease. A correct differential diagnosis between FNH and HCC is critical.
From the Departments of Nuclear Medicine,* Surgery,† Radiology,‡ and Pathology,§ Tri-Service General Hospital, Taipei, Taiwan, Republic of China
Received for publication August 12, 1999.
Reprint requests: Dr. Wen-sheng Huang, Department of Nuclear Medicine, Tri-Service General Hospital, 8, Section 3, Ting-chou Road, Taipei, Taiwan, 100 Republic of China.