I usually use the Merck Manual to look up medical information, it states:
Liddle syndrome is a rare hereditary disorder in which the kidneys excrete K but retain too much Na and water, leading to hypertension. Symptoms are of hypertension, fluid retention, and metabolic alkalosis. Diagnosis is through measurement of urinary electrolytes. K-sparing diuretics provide the best treatment.
Liddle syndrome is a rare autosomal dominant disorder of renal epithelial transport that clinically resembles primary aldosteronism (see Adrenal Disorders: Primary Aldosteronism), with hypertension and hypokalemic metabolic alkalosis but without elevated plasma renin or aldosterone levels. The syndrome results from an inherently increased activity of the luminal membrane Na channels, which accelerates Na resorption and K secretion in the collecting tubule.
Patients with Liddle syndrome present at < 35 yr. Hypertension and signs and symptoms of hypokalemia (see Fluid and Electrolyte Metabolism: Hypokalemia) and metabolic alkalosis occur.
Diagnosis
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Urine Na level
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Plasma renin and aldosterone levels
Diagnosis is suggested by the presence of hypertension in a young patient, particularly one with a positive family history. Low urine Na (< 20 mEq), normal plasma renin and aldosterone levels, and response to empiric treatment usually are considered sufficient to confirm the diagnosis. Definitive diagnosis can be achieved through genetic testing (see
www.genetests.org for more information).
My suggestion is to discuss this with your physician as you do need to get the right
diagnosis code and you need his/her assistance on this to determine the correct synonym for Liddle syndrome.