title: Two-D distance distribution analysis: an application to HBcAg-positive hepatocytes and its relation to septum formation in cirrhosis.
abstract: The morphogenesis of cirrhotic septa in chronic hepatitis B was studied assuming that they arise at the sites of hepatocellular necrosis invoked by host immune reaction against HBcAg-expressing hepatocytes. Sections from three livers with chronic hepatitis B, all in cirrhotic stage, were immunostained with HBcAg and subjected to morphometry to analyze the distribution of HBcAg(+) hepatocytes and its relation with septa. HBcAg(+) cells were not distributed randomly over the nodules but forming focal areas. The septum formation along these foci was shown by 2-D distance distribution analysis, a technique we devised. Upon a sheet of color microphotograph of immunostained section, hundreds of test points each 400 microns apart were arranged by overlaying a tessellated grid. From each of the points hitting the nodules, the distance to the nearest nodulo-septal border D(min) was measured. Measurement was performed on a total of 2,585 test points. It was shown that the mean D(min) in the HBcAg(+) areas was significantly smaller than in HBcAg(-) areas. Thus, the cirrhotic septa are considered to arise at the places of HBcAg(+) foci, connecting them by postnecrotic collapsing.
authors.affiliation: Department of Pathology, Tohoku University, Sendai, Japan. mareyuki@idac.tohoku.ac.jp
authors.forename: M
authors.initials: M
authors.lastname: Endoh
authors.forename: R
authors.initials: R
authors.lastname: Chiba
authors.forename: T
authors.initials: T
authors.lastname: Takahashi
mesh_terms: D002908:Chronic Disease; D006509:Hepatitis B / Q000150:complications / Q000276:immunology*; D006512:Hepatitis B Core Antigens / Q000032:analysis / Q000276:immunology*; D006515:Hepatitis B virus / Q000276:immunology; D006801:Humans; D019044:Image Cytometry; D008103:Liver Cirrhosis / Q000276:immunology / Q000473:pathology*
chemical_list: D006512:Hepatitis B Core Antigens