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.
What exactly is poliosis and what does an overview of it involve?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What exactly is poliosis and what does an overview of it involve? [/INST] \n 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.</s>