Due to this dual function, LSD1 regulates key biologicalprocesses, including cell differentiation, development, and tumorigenesis,making it a critical factor in both physiological and pathologicalconditions., LSD1 is overexpressed in variouscancers, including leukemia, lung cancer, and breast cancer, and severalsmall-molecule LSD1 inhibitors (LSD1i) are currently in clinical trialsfor cancer treatment. The gene discussed is KDM1A; the disease is lung cancer.