Urology is the field of medicine that focuses on diseases of the urinary tract and the male reproductive tract and treats general diseases of the urinary. Patients may be referred to a urologist if their physician suspects they may need treatment for a condition relating to bladder, urethra, ureters, kidneys, and adrenal glands. In men, urologists treat disorders related to the epididymis, penis, prostate, seminal vesicles, and the testes.