Poliosis is a condition in which there is a lack of pigment in the hair, eyebrows and eyelashes, which appear...

Poliosis is a condition in which there is a lack of pigment in the hair, eyebrows and eyelashes, which appear whitish, grey. The condition normally occurs in patches. It is often associated with vitiligo, alopecia and forms part of the Vogt-Koyanagi-Harada syndrome.
Microscopically, poliosis demonstrates either decreased or absent melanin and/or melanocytes in the hair bulbs of the affected hair follicles

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