<prompt> Which is the screening test for evaluation of mineralocoicoid excess?Saline infusion testSalt loading testCosyntropin testAldosterone renin ratio  <response>: The accepted screening test for mineralocoicoid excess is aldosterone renin ratio. Since the leading cause is Adrenal Adenoma, the autonomous aldosterone values will rise and renin values will be low due to feedback. ARR screening is positive if ratio is 750pmolL per ngml. Spironolactone should be discontinued for at-least 4 weeks before performing this test for obvious reasons. This is followed by performance of investigation of choice for mineralocoicoid excess which is Saline infusion test. 