bladder neoplasm (abnormal growth), urinary tract inection, glomerulonephritis (inflamation in the glomerul part of the kidney), obstructive uropathy, pancreatits, papillary necrosis and cortical necrosis (have no idea what this is), perirenal
abscess, polycystic
kidney disease, pyelonephritis, renal infraction, renal neoplasm, renal trauma, and renal vein thrombosis. So you can see many thngs "could" cause the pain you're experiencing. Your dr.