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Images of regularly shaped hepatocellular carcinoma on contrast-enhanced ultrasound. Images of simple nodular type: (a) Hepatocellular carcinoma (2 cm, segment 3) was evaluated as non-irregular type by conventional B-mode ultrasound (b) and non-irregular type as an image defect in the post-vascular phase of contrast-enhanced ultrasound. (c) Examination of the resected specimen identified the mass as the simple nodular type. Arrows indicate the tumor.
