ABCB1 and neoplasm: Patients with the tumor located at the PT had more infiltration of TIA1+ cells compared with tumors located in the DF (PT: 53.3%, N = 16; vs. DF: 24.6%, N = 15; p = 0.010) and a higher expression of p-glycoprotein (PT: 64.5%, N = 20; vs. DF: 40.3%, N = 25; p = 0.047).