Tricho-Poliosis

 Tricho-poliosis (po’lē-ō’sis), A patchy absence or lessening of melanin in hair of the scalp, brows, or lashes, due to lack of pigment in the epidermis; it occurs in several hereditary syndromes but may be caused by inflammation, irradiation, or infection such as herpes zoster. Synonym(s): trichopoliosis [G., fr. polios, gray]… This content is for All-Access Monthly Membership members only.Login Join Now...

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