[Imaging of adenomatous hyperplastic lesions containing and not containing hepatocellular carcinoma in the liver].

In 41 patients with 54 lesions which were resected ans studied histopathologically, there were 14 lesions of adenomatous hyperplasias (AH) in 9 patients, 28 AHs containing hepatocellular carcinoma foci (early HCC, e-HCC) in 22 and 12 borderline lesions which fell between these two lesions in 10. The detectability of these lesions on imagings was evaluated. Detection rates for all lesions and e-HCCs were as follows; intraoperative sonography, 70.0%, 87.5%; Portal-CT, 71.4%; sonography, 44.4%. 64.3%; Arterial-CT, 37.5%, 50.0%; CT, 32.7%, 57.7%; angiography, 17.0%, 30.8%; Lipiodol-CT, 9.1%. 25.0%. On angiography, tumor stain was recognized in only 8 patients with e-HCC. Arterial-CT showed a relatively low density mass compared to non-tumorous area in 2 patients with e-HCC and one with borderline lesion. The median size of 54 lesions was 1.2 +/- 0.4 cm in diameter and that of AHs was 0.8 +/- 0.3 cm, the latter being significantly smaller than the other two lesions (p less than 0.01). Liver cirrhosis coexisted in 35 of 41 patients (85.4%). No complete necrosis occurred in 13 e-HCC lesions following therapeutic embolization or infusion chemotherapy in the hepatic artery.