What's new in neoplastic pulmonary pathology 2026: updates on grading, staging and molecular testing.

Neoplastic pulmonary pathology has continued to advance in recent years, including the introduction of histologic grading systems for both adenocarcinoma and squamous cell carcinoma, implementation of the UICC TNM 9th Edition classification, expanded molecular testing requirements, refinements in neuroendocrine tumor classification, and improvements in mesothelioma diagnostics. This newsletter summarizes the most important developments relevant to practicing pathologists.