COL1A1 expression was distinctly correlated to tumor purity (cor = −0.257; p = 1.67e − 02), CD4+ T cells (cor = −0.221; p = 4.38e − 02), macrophages (cor = 0.414; p = 8.86e − 05), and neutrophils (cor = −0.266; p = 1.45e − 02). Here, COL1A1 is linked to neoplasm.