CD4 and neoplasm: Additionally, we also assessed the correlation between KRTCAP2 expression and immune cell infiltration across various tumors and found KRTCAP2 expression exhibited a negative correlation with several immune cell populations, including T cells gamma delta, CD8+ T cells, CD4+ memory activated T cells, neutrophils, monocytes, resting mast cells, M1 macrophages, and activated dendritic cells, across multiple tumor types.