“…Lung cancer is one of the most common types of cancer worldwide, which can be primarily classified into two types based on the distinct growth patterns of tumor cells: small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC). , NSCLC accounts for 85% of cases and is difficult to detect and diagnose in the early stages due to its slower growth and proliferation, as well as the lack of obvious warning signs. − Currently, common diagnostic methods for lung cancer include computed tomography, magnetic resonance imaging, and histopathological analysis. However, these techniques often present operational difficulties and are limited by their high costs. , Calcium-activated neutral protease 2 (CAPN2) is a calcium-dependent cysteine protease that plays a crucial role in angiogenesis, cell proliferation, and migration. Abnormal expression of CAPN2 has been observed in NSCLC, establishing it as a significant biomarker for NSCLC .…”