AbstractEchography is complementary to conventional uroradiological examination. Mass lesions should be examined by ultrasound to discover their nature–cystic or solid–and to determine which definitive diagnostic examination (cyst puncture or angiography) will be indicated. Multiple cystic and polycystic kidneys, hydronephrosis and renal transplants have been demonstrated. Such examinations have been fitted into the routine workload of an obstetrics u