Abstract
Clinicopathologic examination of 33 nodules from 23 cases of minimum-sized hepatocellular carcinoma (HCC), less than 15 mm in diameter, was carried out by imaging and clinical follow up. On ultrasound (US), 16 hypoechoic nodules (48%) and 15 hyperechoic nodules (45%) on angiography 7 tumour stains (21%) and on computerized tomography (CT) 3 low density nodules (9%) were detected. Of 27 nodules on lipiodol CT (LpCT), 7 lipiodol-deposited nodules (26%) were detected. Of 16 nodules on CO2US angiography (US-angiography), 7 hypervascular (44%), 5 hypovascular (31%) and 4 isovascular nodules (25%) were detected. Of 13 nodules on CT during arterial portography (CTAP), 7 perfusion defect nodules (54%) were detected. The nodules were graded according to the Edmondson & Steiner Classification. Three nodules were resected; grossly, two were not distinct and one was poorly demarcated. Histologically, they were highly differentiated with irregularly-thin trabecular-patterned HCC where portal triads were detected. Cancer cells invaded the non-cancerous liver cells by replacement, and the border between the cancerous and non-cancerous regions was unclear; the latter region manifested chronic hepatitis or liver cirrhosis without hyperplasia. M...Continue Reading
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