[Detection and qualitative evaluation of small hepatocellular carcinoma by ultrasonography--matters to be heeded and limitations].
D006528:Carcinoma, Hepatocellular / Q000175:diagnosis*; D006391:Hemangioma / Q000175:diagnosis; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis*; D009362:Neoplasm Metastasis; D014463:Ultrasonography