Non Small Cell Lung Cancer Treatment segmentation by type distinguishes adenocarcinoma, squamous-cell carcinoma, and large-cell carcinoma. Adenocarcinoma accounts for roughly 40 % of incident cases and drives the largest share of EGFR, ALK, ROS1 and BRAF targeted-therapy revenue, anchoring the market’s precision-medicine expansion. Squamous-cell carcinoma, 25–30 % of diagnoses, remains dependent on platinum-doublet chemotherapy and PD-1/PD-L1 inhibitors; its lower mutation burden limits targeted options but supports a stable immunotherapy patient pool. Large-cell carcinoma, <10 %, is a histological default when glandular or squamous differentiation is absent; its aggressive course sustains demand for cytotoxic regimens and investigational agents, contributing modest but non-negligible sales volume.