A Case of Small Cell Carcinoma of the Lung Producing ADH, ACTH, MSH and Calcitonin: Successful Treatment of Severe Hyponatremia with Furosemide and Hypertonic Saline |
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Authors: | YAMAGUCHI KEN; ABE KAORU; ADACHI ISAMU; TANAKA NOBUYOSHI; TANAKA MASAHIRO; MIYAKAWA SUMIKO; KAMEYA TORU; KIMURA TOKIHISA |
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Institution: | Endocrinology and Pathology Divisions, National Cancer Center Research Institute Tokyo, Japan
*Department of Internal Medicine, Tohoku University School of Medicine, Sendai Japan |
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Abstract: | A 48-year-old man with a small cell carcinoma of the lung presentedhyponatremia and was diagnosed as having the syndrome of inappropriateADH secretion. A plasma ADH bioassay confirmed this syndrome.During the clinical course, the patient developed a hyponatremiccrisis with a serum sodium of 108mEq/l. His hyponatremia wasrapidly corrected by infusing furosemide in conjunction withhypertonic saline. The postmortem studies demonstrated ADH bioactivityin the tumor tissues, as well as immunoreactive ACTH, ß-MSHand calcitonin. Tumor hypersecretion of ACTH appeared to bethe cause of the patient's hyperresponsiveness to exogenousACTH and of the bilateral adrenocortical hyperplasia observedat the time of autopsy. Therefore, this was a case of a multiple hormone-producing smallcell carcinoma of the lung, in which the severe clinical manifestationsof SIADH were successfully treated with furosemide and hypertonicsaline. |
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