Immunohistochemical results: phosphocreatine kinase (CK) broad (+), CK5/6 (+), P63 (+), CK7 (partial +), CK19 (weak +), CD20 (lymphocytes +), WT-1 (-), Calretinin (-), CD5 (sporadic +), CD117 (-), TdT (sporadic +), PD-1 (-), PD-L1 (tumor cells +, 99%; immune cells +, 1%), MSH6 (+), PMS2 (+), MLH1 (+), MSH2 (partial +), CD56 (-), Syn (-), CgA (-), Ki-67 (15%). Here, CD274 is linked to neoplasm.