Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Poliosis
Introduction
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Overview
Overview
Poliosis is the decrease or absence of melanin in the hair, eyebrows, or eyelashes that may occur in a patient with Waardenburg syndrome, tuberous sclerosis, Vogt-Koyanagi-Harada syndrome, or other disorders affecting melanin-containing tissues. This condition may present as singular or multiple white patches on the hair resembling birthmarks.