Spontaneous rupture of the ureter often occurs secondary to ureteral lithiasis with urinary tract obstruction and resultant increased intraluminal pressure and subsequent rupture, or can be secondary to a tear of the ureter during passage of the stone. Peritoneal irritation by urine results in presentation with an acute abdomen. Abdominal CT with contrast, including a urographic (excretory) phase, affords the correct diagnosis.

Case courtesy: Dr. Alessandra Guerra