always take renal colic seriously: a rare complication of renal stone

Pelvis rupture secondary to renal colic is an exceptionally rare but severe complication of nephrolithiasis. this case report describes a 32-year-old male who presented with intense flank pain, gross hematuria, and urinary obstruction. a computed tomography (ct) scan revealed a 3-mm calculus at the ureterovesical junction causing hydronephrosis and, notably, a rupture of the renal pelvis with urine extravasation into the retroperitoneal space. immediate intervention included ureteroscopic lithotripsy, stent placement, and antibiotic therapy, leading to symptom resolution and improved renal function. this report highlights the diagnostic challenges associated with pelvis rupture, which often mimics typical renal colic symptoms, and emphasizes the critical role of contrast-enhanced ct in detection. prompt management is essential to prevent complications such as sepsis and long-term renal damage. the case underscores the importance of recognizing this rare entity to optimize patient outcomes and guide future clinical approaches to similar presentations.