Nephrogenic Diabetes Insipidus After Esophagectomy in a Pati
Nephrogenic diabetes insipidus occurs in patients on chronic lithium treatment even after lithium discontinuation. Patients affected by this disorder are highly vulnerable to hypernatremia when they cannot respond to their thirst mechanism. International Journal of Surgery Case Reports, presents a rare case of hypernatremia due to undiagnosed nephrogenic diabetes insipidus post esophagectomy in a patient with remote history of lithium use.

PRESENTATION OF CASE:
A 70-year-old female with past medical history of bipolar disorder, chronic kidney disease and pheochromocytoma underwent an elective esophagectomy for esophageal adenocarcinoma. Lithium was discontinued 10 years prior to her presentation. She was kept nil per os post operatively and subsequently developed altered mental status necessitating intubation. Her sodium level was found to be 156 mmol/L. A water deprivation test and desmopressin trial confirmed nephrogenic diabetes insipidus. Days after dextrose 5% in water infusion, free water flushes through the jejunostomy tube and hydrochlorothiazide, her hypernatremia improved slowly with subsequent improvement in her mental status.

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