poliosis
Poliosis is a localized patch of white or gray hair caused by a loss or absence of pigment-producing melanocytes in the hair follicle. The affected area can occur on the scalp, eyebrows, eyelashes, or beard and may be present at birth or develop later in life. The condition is typically permanent for the patched hair, though surrounding hair may remain normally pigmented.
Causes and associations include genetic conditions such as Waardenburg syndrome, which often features poliosis together with
Pathophysiology involves disruption or loss of melanocytes in the hair follicle, leading to reduced or absent
Diagnosis is usually clinical, based on appearance and history. Dermoscopy or biopsy is rarely required but
Management focuses on addressing any underlying condition, when identified. There is no specific treatment to restore