Which one of the following is false regarding primary adrenal hyperplasia?

Primary adrenal hyperplasia leads to increased mineralocoicoid activity and hence sodium and water retention with increased potassium excretion. Primary adrenal hyperplasia (PAH) is a clinical finding that can only be realized after surgery. Findings of PAH include severe hypokalemia and hypeension responsive to spironolactone, and elevated supine plasma aldosterone and 18-hydroxycoicosterone values that did not increase after ambulation.