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| Diabetes Insipidus, Nephrogenic Nephrogenic Diabetes Insipidus A polyuric disorder characterized by normal rates of renal filtration and solute excretion, but a persistent hypotonic urine. This condition is due to the failure of renal tubules to respond to antidiuretic hormones, such as vasopressin, to reduce urine volume. Tubular insensitivity to vasopressin can result from genetic defects, diseases, drug effects, or may occur with pregnancy. |