title: Nuclear morphology in preneoplastic lesions of rat liver.
abstract: The nuclear morphology of preneoplastic and unaltered hepatocytes in diethylnitrosamine-treated rats was investigated. Two-micrometer-thick sections of methacrylate-embedded liver were scanned with a TV camera and evaluated in a computer using multivariate analysis methods. The preneoplastic cell populations (islands) were distinguished from unaltered hepatocytes by histochemical demonstration of glycogen storage in specimens from starved animals. After the hemalaun-stained liver sections were scanned randomly, the sections were stained for glycogen, and the previously registered cells were identified visually using a scanning stage for relocation. This objective identification of unaltered and preneoplastic hepatocytes formed the basis for the selection of a training set for feature evaluation and supervised classification. Image analysis for quantitative nuclear morphology was applied to the hemalaun-stained cells. The results showed that condensed chromatin was reduced and nuclear area was increased in the nuclei of glycogen-storing cells. Differences in the nuclear structure were also found. A multivariate analysis including seven features gave a correct classification result of about 82%.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000473:pathology*; D003584:Cytological Techniques; D004052:Diethylnitrosamine / Q000494:pharmacology; D005260:Female; D006651:Histocytochemistry; D008112:Liver Glycogen / Q000032:analysis; D008113:Liver Neoplasms / Q000139:chemically induced / Q000473:pathology*; D008905:Minicomputers; D011230:Precancerous Conditions / Q000139:chemically induced / Q000473:pathology*; D051381:Rats; D011919:Rats, Inbred Strains; D013194:Staining and Labeling / Q000379:methods
chemical_list: D008112:Liver Glycogen; D004052:Diethylnitrosamine