Onychodystrophy is a common problem and may have multiple causes, both internal and environmental. We present an unusual nail finding in a gentleman without any identifiable etiology. He and several family members had isolated notching of the thumbnails with a characteristic erythematous band.
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References
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BaranRPerrinC. Longitudinal erythronychia with distal subungual keratosis: Onychopapilloma of the nail bed and Bowen's disease. Br J Dermatol2000; 143:132–135.
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