We further show that they may indicate distinct subtypes of PD-L1 neg. tumors with STK11 mutant tumors exhibiting strikingly worse prognosis after ICB (med. PFS 52 vs 64 days, p<1e-3; med. OS 212 vs 299 days, p=5e-3). We further show that they may indicate distinct subtypes of PD-L1 neg. tumors with STK11 mutant tumors exhibiting strikingly worse prognosis after ICB (med. PFS 52 vs 64 days, p<1e-3; med. OS 212 vs 299 days, p=5e-3).