Normal variant and congenital anomalies.- Urinary tract infection.-  Renal cystic disease -- Renal parenchymal neoplasms.- Lesions of the renal pelvicalyceal system, ureter, bladder and urethra -- Vascular diseases -- Retroperitoneum -- Adrenal gland.- Male reproductive system: Prostate , seminal vesicles and testicular lesions.- Female reproductive system: Uterine body, uterine cervix, ovary, vagina -- Nephrological, systemic and non-urinary diseases with urinary tract involvement.