Urinary bladder outlet obstruction

Longitudinal ultrasound images of the right (A) and left (B) kidneys show bilateral hydronephrosis. Transverse image of the pelvis (C) shows a full bladder. Repeat images of the right (D) and left (E) kidneys and bladder (F) after the patient attempted to void show persistent hydronephrosis and no change in bladder distension, indicating bladder outlet obstruction. Similar findings may be seen in patients with neurogenic bladder.