title: A comparative study of neuroendocrine carcinoma and carcinoid tumor with special reference to expression of HLA-DR antigen and PCNA.
abstract: Both carcinoid tumor (carcinoid) and neuroendocrine carcinoma (NEC) are composed of neuroendocrine cells which are positive for chromogranin. The former is a low grade malignancy but NEC is a highly aggressive malignancy. We compared histological differences of those tumors using antibodies to major histocompatibility complex (MHC) class II antigens HLA-DR, proliferating cell nuclear antigen (PCNA), Leu7 (CD57), CEA and P53. Most characteristic differences between those tumors were in the expression of HLA-DR and PCNA. HLA-DR positive capillary endothelial cells were abundant in carcinoid as well as in non-tumorous endocrine organs but sparse in NEC. On the contrary, cells positive for PCNA were 92% in NEC, but 27% in carcinoid. We concluded that carcinoid imitates an endocrine organ in both morphology and function, but NEC deviates far from it.
authors.affiliation: Department of Pathology, Tohoku University School of Medicine, Sendai, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Kimura
authors.forename: H
authors.initials: H
authors.lastname: Nagura
mesh_terms: D015703:Antigens, CD / Q000032:analysis; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis; D000951:Antigens, Neoplasm / Q000032:analysis; D014408:Biomarkers, Tumor / Q000032:analysis*; D018959:CD57 Antigens; D002272:Carcinoembryonic Antigen / Q000032:analysis; D002276:Carcinoid Tumor / Q000473:pathology* / Q000601:surgery; D002277:Carcinoma / Q000473:pathology* / Q000601:surgery; D005260:Female; D005706:Gallbladder Neoplasms / Q000473:pathology; D006684:HLA-DR Antigens / Q000032:analysis* / Q000096:biosynthesis; D006801:Humans; D008113:Liver Neoplasms / Q000473:pathology; D008175:Lung Neoplasms / Q000473:pathology; D008297:Male; D009362:Neoplasm Metastasis; D009687:Nuclear Proteins / Q000032:analysis* / Q000096:biosynthesis; D018809:Proliferating Cell Nuclear Antigen; D013274:Stomach Neoplasms / Q000473:pathology; D016159:Tumor Suppressor Protein p53 / Q000032:analysis
chemical_list: D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; D018959:CD57 Antigens; D002272:Carcinoembryonic Antigen; D006684:HLA-DR Antigens; D009687:Nuclear Proteins; D018809:Proliferating Cell Nuclear Antigen; D016159:Tumor Suppressor Protein p53