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Three Synchronous Tumors Discovered in SIADH Investigation
Ricardo Fonseca, Filipa Monteiro, Rita Mendes
European Journal of Case Reports in Internal Medicine - © EFIM


Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH) is a common cause of euvolemic hyponatremia which has many possible etiologies such as tumors (mainly lung cancers). We present a case of a 79-year old women hospitalized due to microcytic anemia with transfusion need and hyponatremia due to SIADH. Three primary tumors without known metastasis were discovered. The case shows the importance of studying causes of hyponatremia.


Hyponatremia, SIADH, Synchronous tumors

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