​Differential diagnosis of decreased excretion leading to hyperkalemia

​Differential diagnosis of decreased excretion leading to hyperkalemia 
-renal failure 
-drugs which inhibit potassium excretion such as spironolactone, triamterene, ACE inhibitors, NSAIDS, trimethoprim, 
-renal secretory defects such as interstitial nephritis, sickle cell disease 
-hypoaldosteronism due to hyporeninism ( type IV renal tubular acidosis such as diabetic nephropathy, heparin, AIDS, adrenal insufficiency