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Hand Lesions as a Diagnostic Clue in Unexplained SIADH
Nobuko Watanabe1, Takuya Omura2,3, Takahiro Kamihara4
1Department of Medical Education Hospital, National Center for Geriatrics and Gerontology Obu Japan.
Abstract:
In apparently idiopathic syndrome of inappropriate antidiuretic hormone secretion (SIADH), chilblain-like hand plaques may reveal autoimmune connective tissue disease. Skin examination, biopsy, and serology can uncover discoid lupus erythematosus with Sjögren's syndrome overlap. Serum sodium improvement after skin treatment requires caution because spontaneous stabilization cannot be excluded.
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