The aim of the study was to determine the level of ANG and ANGST as parameters of angiogenesis, 8-iso-PGF2α as an indicator of oxidative stress, SNCG as a stimulator of tumor progression, and IL-13 as an inflammatory immunomodulator in the urine of patients with bladder cancer and to estimate their potential as possible diagnostic parameters in these patients. The gene discussed is IL13; the disease is neoplasm.