POSTN⁺ CAF–SPP1⁺ macrophage crosstalk is associated with immune exclusion and poor prognosis in lung adenocarcinoma
A spatially organized POSTN⁺ CAF–SPP1⁺ macrophage niche that may contribute to stromal remodeling, CD8⁺ T-cell exclusion, and potentially reduced immunotherapy benefit in LUAD is defined.