Abstract
Peritoneal fistulization of pyonephrosis is an uncommon condition, leading to a generalized peritonitis, considered as extreme life-threatening emergency. Secondary to an obstructive uropathy, increasing intra-renal pressure. In most cases, ureteral stones represent the underlying causes followed by stenosis, tumor, or connective tissue disease. Through this case report, we present a 60-year-old patient with a history of urolithiasis, admitted for an atypical instance of spontaneous renal pelvis rupture in an ectopic right kidney managed surgically. This case emphasizes the importance of considering renal etiology in cases of peritonitis and underscores the rarity of such occurrences.