Caveolin-1 is a novel immunohistochemical marker to differentiate epithelioid mesothelioma from lung adenocarcinoma

Vishwa Jeet Amatya, Yukio Takeshima, Hidekazu Kohno, Kei Kushitani, Taketo Yamada, Chikao Morimoto, Kouki Inai

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Abstract

Aims: The incidence of mesothelioma is increasing in Europe, Japan and other developing countries. There is difficulty in the accurate diagnosis of mesothelioma and its differentiation from lung adenocarcinoma. Mesothelioma shows a complex immunohistochemical profile. Therefore, the use of a immunohistochemical panel that includes both positive and negative mesothelial markers has become a general rule for its accurate diagnosis. However, they are still not sufficient. The aim was to assess the diagnostic utility of caveolin-1 (Cav-1), which is expressed in endothelial cells, alveolar type I pneumocytes and mesothelial cells, as a novel positive marker of mesothelioma. Methods and results: An immunohistochemical study of 80 cases of epithelioid mesothelioma and 80 cases of lung adenocarcinoma was performed for the analysis of the expression of Cav-1 and other markers. Cav-1 expression with a membranous and / or cytoplasmic pattern was found in all of the epithelioid mesothelioma. Of these, 42 cases (52.5%) showed Cav-1 expression in >50% of tumour cells, 34 cases (42.5%) in 650% of tumour cells, and four cases (5.0%) in <5% of tumour cells. In contrast, only six cases (7.5%) of lung adenocarcinoma showed focal Cav-1 expression in the cytoplasm of the tumour cells. The sensitivity and specificity of Cav-1 expression for the differentiation of epithelioid mesothelioma from lung adenocarcinoma were 100 and 92.5%, respectively. This is comparable or even superior to that of currently available positive markers such as calretinin or D2-40. Conclusions: Cav-1 is a novel immunohistochemical marker for the differentiation of epithelioid mesothelioma from lung adenocarcinoma.

Original languageEnglish
Pages (from-to)10-19
Number of pages10
JournalHistopathology
Volume55
Issue number1
DOIs
Publication statusPublished - 2009 Jul

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Keywords

  • Caveolin-1
  • Differential diagnosis
  • Epithelioidmesothelioma
  • Immunohistochemistry
  • Lungadenocarcinoma

ASJC Scopus subject areas

  • Histology
  • Pathology and Forensic Medicine

Cite this

Amatya, V. J., Takeshima, Y., Kohno, H., Kushitani, K., Yamada, T., Morimoto, C., & Inai, K. (2009). Caveolin-1 is a novel immunohistochemical marker to differentiate epithelioid mesothelioma from lung adenocarcinoma. Histopathology, 55(1), 10-19. https://doi.org/10.1111/j.1365-2559.2009.03322.x