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Vitiligo (/ ˌ v ɪ t ɪ ˈ l aɪ ɡ oʊ /, vi-ti-leye-goh) is a chronic autoimmune disorder that causes patches of skin to lose pigment or color. [1] The cause of vitiligo is unknown, but it may be related to immune system changes, genetic factors, stress, or sun exposure. [5] [6] Treatment options include topical medications, light therapy ...
Melena is a form of blood in stool which refers to the dark black, tarry feces that are commonly associated with upper gastrointestinal bleeding. [1] The black color and characteristic strong odor are caused by hemoglobin in the blood being altered by digestive enzymes and intestinal bacteria.
PUVA (psoralen and UVA) is an ultraviolet light therapy treatment for skin diseases: vitiligo, eczema, psoriasis, graft-versus-host disease, mycosis fungoides, large plaque parapsoriasis, and cutaneous T-cell lymphoma, using the sensitizing effects of the drug psoralen.
Licorice root: Known for its brightening properties, licorice plant contains an ingredient called glabridin which inhibits pigmentation, according to the National Center for Biotechnology.
The pigment loss can be partial (injury to the skin) or complete (caused by vitiligo). It can be temporary (from tinea versicolor) or permanent (from albinism). [1] Most commonly, depigmentation of the skin is linked to people born with vitiligo, which produces differing areas of light and dark skin. Monobenzone also causes skin depigmentation.
It is a type of melanin and similar to other forms of peripheral melanin. It is insoluble in organic compounds, and can be labeled by silver staining. It is called neuromelanin because of its function and the color change that appears in tissues containing it. It contains black/brown pigmented granules.
Poliosis is present in half of patients with segmental vitiligo. [5] Vogt-Koyanagi-Harada Syndrome (VKH): VKH is a systemic autoimmune disorder affecting melanin-containing tissues, leading to uveitis, meningitis, and poliosis, which often involves the eyebrows and eyelashes. [6]