Urine osmolality

An increase in urine volume and urine osmolality can indicate a number of diseases.

Differential Diagnosis
In alphabetical order.

Increased

 * Acidosis
 * Addison's Disease
 * Congestive Heart Failure
 * Hepatic cirrhosis
 * Hypernatremia
 * Shock
 * Syndrome of Inappropriate Anti Diuretic Hormone (SIADH)

Decreased

 * Aldosteronism
 * Diabetes Insipidus
 * Drinking excess water
 * Hypercalcemia
 * Hypokalemia
 * Renal Tubular Necrosis

In renal diseases

 * Amyloidosis
 * Chronic Interstitial Nephritis
 * Chronic pyelonephritis
 * Glomerulonephritis
 * Lithium damage
 * Nephrogenic diabetes
 * Polycystic kidneys

Acknowledgements
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