Syndrome of inappropriate antidiuretic hormone secretion in association with herpes zoster of the chest wall. A case report.

The syndrome of inappropriate antidiuretic hormone secretion (SIADH) occurs in a number of diverse medical conditions. We report a case in which SIADH and herpes zoster of the chest wall occurred concurrently. In the absence of other recognized causes we suggest that the two conditions may have been related and speculate on possible mechanisms.