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Prognostic value of nucleolar organizer regions in neuroendocrine tumours of the lung

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Abstract

The value of the number and size of the nucleolar organizer regions (NORs) as prognostic indicators in human neuroendocrine lung tumours was evaluated in a quantitative study of 57 cases, including 33 small cell carcinomas (SCLCs), 9 well-differentiated neuroendocrine carcinomas (WDNECs) and 15 “classic” carcinoids. NORs were visualized on paraffin sections by an argyrophilic technique (AgNOR) and measured by automatic image analysis. In each case, the mean number and area of AgNORs were evaluated; the results were compared with clinical follow-up and survival. AgNOR values for both number and area were significantly higher in SCLCs than in WDNECs and carcinoids. WDNECs had insignificantly higher AgNOR values than carcinoids. Among SCLCs, AgNOR values of the oat cell subtype and the intermediate cell subtype did not differ significantly. Regardless of the histological tumour type, AgNOR values strongly correlated with prognosis, with more and larger AgNORs indicating a more progressive clinical course. In the present study we demonstrate for the first time that the biological behaviour of neuroendocrine lung tumours is correlated with the number and size of AgNORs. Thus the measurement of AgNORs may serve as an additional prognostic indicator in these neoplasms, particularly in the separation of SCLCs from WDNECs with a more favourable prognosis.

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Authors and Affiliations

  1. Institute of Pathology, Technische Universität München, School of Medicine, Ismaninger Strasse 22, W-8000, Munich 80, Germany

    J. Böhm, V. Kacic & H. Höfler

  2. GSF-Forschungszentrum für Umwelt und Gesundheit GmbH, Neuherberg, Germany

    P. Gais & H. Höfler

  3. Department of Surgery, Technische Universität München, School of Medicine, Munich, Germany

    H. W. Präuer

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  1. J. Böhm
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  2. V. Kacic
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  3. P. Gais
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  4. H. W. Präuer
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  5. H. Höfler
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Böhm, J., Kacic, V., Gais, P. et al. Prognostic value of nucleolar organizer regions in neuroendocrine tumours of the lung. Histochemistry 99, 85–90 (1993). https://doi.org/10.1007/BF00268025

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