Herpes zoster ophthalmicus and syndrome of inappropriate antidiuretic hormone secretion.

Presented here is a case of syndrome of inappropriate antidiuretic hormone secretion (SIADH) that developed in an elderly woman with single dermatomal herpes varicella zoster ophthalmicus without evidence of varicella-zoster encephalitis or dissemination. This is only the third such case reported in the English language literature to date, and it affirms that SIADH can develop in patients with herpetic involvement of just a single dermatome and corrects with resolution of the herpetic lesions.