[Ultrasonic diagnosis of tumors of the kidney and retroperitoneum].
D001706:Biopsy; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis*; D009393:Nephritis / Q000175:diagnosis; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*; D014463:Ultrasonography / Q000379:methods*