Pleural malignant mesothelioma in Tuscany, Italy (1970–1988): I. Anatomo‐pathologic aspects

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Abstract
Our investigation did not confirm the general experience that significant numbers of cases initially considered malignant mesothelioma or metastatic carcinoma are actually found to be metastatic carcinoma or malignant mesothelioma, respectively, upon deeper investigation using ancillary techniques (e.g., histochemistry, immunohistochemistry, electron microscopy). Well-trained pathologists, expert in thoraco-pulmonary pathology, have a high inter- and intra-rater agreement and significantly better results than standard hospital pathologists in correctly differentiating malignant mesothelioma from metastatic carcinoma. Therefore, epidemiologic investigations which exclude an accurate and rigorous reevaluation of the histologic slides have to be considered unreliable, unless the data come from a specialized medical center experienced in this type of pathology.