title: Demonstration of Lipiodol in paraffin sections using a modified silver impregnation technique.
abstract: To demonstrate postangiographic Lipiodol (LIP) in hepatocellular carcinoma (HCC) in paraffin sections, direct impregnation of formalin-fixed tissue blocks with silver nitrate (AgNO3) was followed by routine processing. LIP appeared as black globules in the sinusoids. Ninety-four tissue blocks from 13 postangiographic LIP HCCs and 69 from 8 non-LIP HCCs and 4 fatty livers were studied. Seventy-two of 73 negative controls and all positive blocks as seen on soft tissue radiographs (STRs) were correctly coded (specificity 98.6%, sensitivity 100%). Twenty-six of the 44 LIP-negative areas on STRs from LIP cases contained scanty globules of less than 10 microns in diameter. Fatty change gave no positive readings. Thus, modified AgNO3 impregnation is a simple, accurate means of detecting LIP in high-quality paraffin sections suitable for tumor diagnosis and, if applied to postangiographic LIP, ultrasonographically guided liver biopsy, can verify that a biopsy has reached a suspected tumor focus.
authors.affiliation: Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, Chinese University of Hong Kong, Shatin, NT.
authors.forename: M M
authors.initials: MM
authors.lastname: Arnold
authors.forename: A C
authors.initials: AC
authors.lastname: Wallace
authors.forename: L
authors.initials: L
authors.lastname: Kreel
authors.forename: M K
authors.initials: MK
authors.lastname: Li
mesh_terms: D001706:Biopsy; D006528:Carcinoma, Hepatocellular / Q000378:metabolism / Q000473:pathology; D006651:Histocytochemistry / Q000379:methods*; D006652:Histological Techniques; D006801:Humans; D007459:Iodized Oil / Q000378:metabolism*; D008099:Liver / Q000378:metabolism / Q000473:pathology; D008113:Liver Neoplasms / Q000378:metabolism / Q000473:pathology; D010232:Paraffin; D012834:Silver
chemical_list: D012834:Silver; D007459:Iodized Oil; D010232:Paraffin