[Spontaneous extravasation of urine at the pyelo-caliceal level. Spontaneous urinomas]

We present two cases of spontaneous rupture of the excretory tract within the context of reno-ureteral colic due to lithiasis. We comment on the etiopathogenic aspects and underscore the need for emergency evaluation in patients with very severe nephric colic and/or symptoms of peritoneal irritation (ileus, abdominal guarding), and temporary urinary diversion must be performed via nephrostomy as a palliative procedure for the symptoms and to avoid complications.