Which pituitary study findings suggest diabetes insipidus (DI)?

Updated: Mar 18, 2020
  • Author: Romesh Khardori, MD, PhD, FACP; Chief Editor: George T Griffing, MD  more...
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Answer

On MRI, T1-weighted images of the healthy posterior pituitary yield a hyperintense signal. This signal is also invariably present in primary polydipsia. In patients with central DI, this signal is absent, except in a few children with the rare, familial form of the disorder. [33] It is also absent in most patients with nephrogenic DI.


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