A Case of Hyponatremia in Hypothyroidism

Korean Journal of Nephrology 2007;26(4):455-459.

Kyung Hee Woo, M.D., Min Ho Cho, M.D. Jin Kyung Kim, M.D., In Il Park, M.D., Eun Jung Kim, M.D., Soo Jin Kim, M.D., Tae Jin Park, M.D., Young Ki Lee, M.D. and Jung Woo Noh, M.D.

Department of Internal Medicine, Kidney Research Institute College of Medicine, Hallym University, Seoul, Korea

저나트륨혈증으로 진단된 갑상선기능저하증 1예

우경희

한림대학교 의과대학 내과학교실, 신장연구소

Abstract

Hypothyroidism is widely accepted as a cause of hyponatremia, but severe hyponatremia in hypothyroidism is clinically rare. We report a case of 74-year-old female patient presented with severe hyponatremia and hypothyroidism. Hyponatremia gradually improved with water restriction and hypertonic sodium infusion prior to the initiation of thyroid hormone replacement. After a diagnosis of Hashimoto`s thyroiditis had been made, the patient was treated with levothyroxine. She remained well on maintenance dose of levothyroxine with euthyroid and normal serum sodium level.

Key Words: Hyponatremia, Hypothyroidism, Thyroid hormones