The data from the ‘gene’ module of TIMER showed that LCK mRNA expression had a significant negative correlation with tumor purity in GBM, but not in DLBCL (GBM, r = −0.318, P = 2.49E‐11; DLBCL, r = −0.08, P = 6.15E‐1). Here, LCK is linked to diffuse large B-cell lymphoma.