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• W2009408491 abstract "Typical carcinoid, atypical carcinoid, and small cell lung cancer (SCLC) fall within the spectrum of neuroendocrine lung neoplasms. This paper investigates the immunohistochemical expression of the products of tumour suppressor genes p53 and retinoblastoma (RB), together with proliferation (PCNA and Ki67) and neuroendocrine differentiation markers, in 14 typical carcinoids, ten atypical carcinoids, four borderline atypical carcinoid/SCLC, and 11 SCLC. We demonstrated that the phosphoprotein p53 and RB product can be immunolocalized on routine histological material. p53 protein was absent in all typical and atypical carcinoids, while it was abnormally expressed in eight SCLC and one borderline case. RB product was detected in all typical carcinoids and in two atypical carcinoids, while it was consistently absent in the other cases. PCNA-labelled cells were less than 4 per cent in typical carcinoids, about 40 per cent in atypical carcinoids, and over 70 per cent in SCLC. PCNA labelling index discriminates between typical and atypical carcinoids. Neuroendocrine differentiation was evaluated by a semi-quantitative method: a mean score value was obtained, which was high in typical carcinoids, intermediate in atypical carcinoids, and low in SCLC. Our data show that the decrease in neuroendocrine features from typical carcinoid to SCLC is paralleled by an increase in proliferative activity and by an altered expression of tumour suppressor gene products. The above findings have diagnostic relevance." @default.
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• W2009408491 date "1992-04-01" @default.
• W2009408491 modified "2023-09-24" @default.
• W2009408491 title "Tumour suppressor gene products, proliferation, and differentiation markers in lung neuroendocrine neoplasms" @default.
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• W2009408491 doi "https://doi.org/10.1002/path.1711660405" @default.
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