10 Abdominal Pain Quadrant Locations and What Each Area Typically Suggests

8. Right Flank and Costovertebral Angle - Renal and Retroperitoneal Pathology

The right flank region, extending from the costovertebral angle to the iliac crest, represents a critical diagnostic area for identifying renal, ureteral, and retroperitoneal pathology, with pain in this location often indicating conditions requiring urgent medical attention. Nephrolithiasis, or kidney stones, represents the most common cause of flank pain, typically presenting as severe, colicky pain that radiates from the flank to the groin as stones progress down the ureter. The pain from kidney stones is often described as excruciating and comes in waves, frequently accompanied by nausea, vomiting, and hematuria, with patients unable to find a comfortable position. Pyelonephritis, or kidney infection, presents with flank pain that is typically constant rather than colicky, accompanied by fever, chills, and urinary symptoms such as dysuria and frequency. Costovertebral angle tenderness is a classic finding in pyelonephritis and helps differentiate it from lower urinary tract infections. Renal infarction, though less common, can present with sudden onset of severe flank pain accompanied by hematuria and systemic signs of tissue death. Retroperitoneal bleeding, whether from trauma, anticoagulation complications, or ruptured abdominal aortic aneurysm, can manifest as flank pain accompanied by signs of hemodynamic instability. Other considerations include renal cell carcinoma, which may present with the classic triad of flank pain, hematuria, and palpable mass, though this complete presentation occurs in only a minority of cases.