What imaging studies may assist the diagnosis of syndrome of inappropriate antidiuretic hormone secretion (SIADH)?

Updated: Aug 16, 2019
  • Author: Christie P Thomas, MBBS, FRCP, FASN, FAHA; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

Chest radiographs may reveal an underlying pulmonary cause of SIADH. Computed tomography (CT) scanning or magnetic resonance imaging (MRI) of the head may be appropriate in selected cases. The study may show evidence of cerebral edema (eg, narrowing of the ventricles), a complication of SIADH, or may identify a CNS disorder responsible for SIADH (eg, brain tumor). CT scanning or MRI can also help rule out other potential causes of a change in neurologic status.


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