alexa Evaluation of neuroendocrine markers in renal cell carcinoma.
Immunology

Immunology

Journal of Vaccines & Vaccination

Author(s): Ronkainen H, Soini Y, Vaarala MH, Kauppila S, Hirvikoski P

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Abstract BACKGROUND: The purpose of the study was to examine serotonin, CD56, neurone-specific enolase (NSE), chromogranin A and synaptophysin by immunohistochemistry in renal cell carcinomas (RCCs) with special emphasis on patient outcome. METHODS: We studied 152 patients with primary RCCs who underwent surgery for the removal of kidney tumours between 1990 and 1999. The mean follow-up was 90 months. The expression of neuroendocrine (NE) markers was determined by immunohistochemical staining using commercially available monoclonal antibodies. Results were correlated with patient age, clinical stage, Fuhrman grade and patient outcome. RESULTS: Eight percent of tumours were positive for serotonin, 18\% for CD56 and 48\% for NSE. Chromogranin A immunostaining was negative and only 1\% of the tumours were synaptophysin immunopositive. The NSE immunopositivity was more common in clear cell RCCs than in other subtypes (p = 0.01). The other NE markers did not show any association with the histological subtype. Tumours with an immunopositivity for serotonin had a longer RCC-specific survival and tumours with an immunopositivity for CD56 and NSE had a shorter RCC-specific survival but the difference was not significant. There was no relationship between stage or Fuhrman grade and immunoreactivity for serotonin, CD56 and NSE. CONCLUSIONS: Serotonin, CD56 and NSE but not synaptophysin and chromogranin A are expressed in RCCs. However, the prognostic potential of these markers remains obscure.
This article was published in Diagn Pathol and referenced in Journal of Vaccines & Vaccination

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