title: [4 cases of primary liver neoplasms---with special reference to the use of endoscopic retrograde cholangiopancreatography].
mesh_terms: D000328:Adult; D000368:Aged; D001650:Bile Duct Neoplasms / Q000175:diagnosis; D006528:Carcinoma, Hepatocellular / Q000175:diagnosis*; D002760:Cholangiopancreatography, Endoscopic Retrograde; D005260:Female; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged