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Comparative analysis of prognostic histopathologic parameters in subtypes of epithelioid pleural mesothelioma

April 2, 2020 By Thomas Lamb

Aims:  Malignant pleural mesothelioma (MPM) is a rare malignancy with dismal prognosis. While [ epithelioid malignant pleural mesothelioma ] is associated with more favorable outcome, additional factors are needed to further stratify prognosis and to identify patients who can benefit from multimodal treatment. As [ epithelioid malignant pleural mesothelioma ] shows remarkable morphological variability, the prognostic role of the five defined morphologies, the impact of the nuclear grading system and the mitosis-necrosis score were investigated in this study.

Methods and results:  Tumor specimens of 192 patients with [ epithelioid malignant pleural mesothelioma ] from five European centers were histologically subtypes…. Digital slides of 55 independent cases from The Cancer Genome Atlas (TCGA) database were evaluated for external validation. Histologic subtypes were collapsed into three groups based on their overlapping survival curves. The tubulopapillary/microcystic group had a significantly longer overall survival than the solid/trabecular group (732 vs. 397 days, p=0.0013). Pleomorphic tumors had the shortest overall survival (173 days)…. The prognostic significance of all three parameters was externally validated in the TCGA cohort. Patients with tubulopapillary or microcystic tumors showed a greater improvement in overall survival after receiving multimodal therapy than those with solid or trabecular tumors.

Conclusions:  Histologic subtypes of [ epithelioid malignant pleural mesothelioma ] have a prognostic impact and might help to select patients for intensive multimodal treatment approaches.

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Filed Under: Medicine, Mesothelioma Tagged With: malignant pleural mesothelioma (MPM), mesothelioma, mesothelioma treatments

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