A Comprehensive Review of Advances in Molecular Mechanisms and Targeted Therapies for the Specific Type of Cystic Lung Cancer.

Background and Objective: Cystic lung cancer (CLC) presents diagnostic and treatment challenges due to its complex imaging features and unclear molecular mechanisms. Although surgery and standard chemotherapy are frequently used, there is limited information on targeted therapy and other precision treatments. It is crucial to comprehensively understand the molecular mechanisms and explore precision treatments based on targeted therapy. Methods: Topic keywords including "CLC", "cystic lung cancer", "cavitary lung cancer", "Lung cancer associated with cystic airspaces", and "lung cancer" with ("sac cavity" OR "cystic degeneration" OR "thin-walled cavity" OR "adenocystic carcinoma" OR "cystic airspaces" OR "pulmonary cysts" OR "adenoid cystic carcinoma") searched in the relevant databases, such as PubMed, Google Scholar, and CNKI (China National Knowledge Infrastructure). Then, we reviewed and analyzed the molecular mechanism and its precision therapeutics of CLC. Key Content and Findings: Various subtypes of CLC can be identified through histopathological examination, such as cystic adenocarcinoma, and squamous cell carcinoma. However, we still have much to learn about the molecular mechanisms behind CLC. Gene mutation, the abnormal tumor microenvironment, and immune dysfunction are the main mechanisms, along with potential factors like epigenetic modifications and gene susceptibility related to COPD. Recent advancements in treatment include targeted therapies, such as targeted inhibitors for EGFR, ALK, ROS1, BRAF, and MET. Surgical treatment, standardized chemotherapy, immunotherapy, and combination therapy remain important. Future research should focus on genomic and molecular profiling, and the development of precision medicine based on insights into the heterogeneity of CLC. Additionally, investigating resistance mechanisms and developing predictive biomarkers are important for future CLC research. Conclusion: The key molecular mechanisms of CLC involve gene mutations and TME immune dysfunction. CLC still requires standard comprehensive treatment based on lung cancer staging, and targeted therapy has shown significant advantages and development prospects.