Practice guideline for the histopathological diagnosis of mesothelioma (2025 version)

To improve the quality of pathologic diagnosis and enhance the standardization in pathological report of mesothelioma, Expert Committee on Pathology of Chinese Research Hospital Association and Professional Committee on Oncopathology of Shanghai Anticancer Association set up an expert team and establish guideline working groups, which embrace139 mutidisciplinary experts nationwide covering pathology, radiology, oncology, thoracic surgery, epidemiology and health statistics. Based on the principles of scientification, standardization, transparency and institutionalization with adherence to the international guidelines writing standards and guiding principles for the formulation/revision of clinical diagnosis and treatment guidelines in China, experts adopt evidence-based medicine methods, keep updated on the newest progress, focus on the diagnostic principles, immunohistochemistry and molecular pathology, establish quality evaluation and evidence summary, utilize the GRADE system and Delphi method in combination with multidisciplinary expert meetings, draft, modify and finalize this version of practice guideline for the histopathological diagnosis of mesothelioma. The target population and audience of the guideline center on patients with mesothelioma, whereas the users are medical staff engaged in pathological diagnosis and auxiliary testing of mesothelioma. This guideline has been registered in Practice Guide Registration for TransPAREncy (PREPARE) (http://www.guidelines-registry.org), with registration number PREPARE-2024CN672. The plan of the guideline can be obtained from the platform.