Hutchinson Sign
Hutchinson Sign
In this photo, the middle finger is marked by lengthwise discoloration of the nail (melanonychia striata; blue arrow) and hyperpigmentation that extends across the half-moon at the base of the nail (lunula) to the cuticle (Hutchinson sign; red arrow).
Image courtesy of Carl Washington, MD, and Mona Saraiya, MD, MPH, via the Public Health Image Library of the Centers for Disease Control and Prevention.
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Tumors of the Nails