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Hypopigmentation is characterized specifically as an area of skin becoming lighter than the baseline skin color, but not completely devoid of pigment. This is not to be confused with depigmentation , which is characterized as the absence of all pigment. [ 1 ]
Poikiloderma is a skin condition that consists of areas of hypopigmentation, hyperpigmentation, telangiectasias and atrophy. Poikiloderma of Civatte is most frequently seen on the chest or the neck, characterized by red colored pigment on the skin that is commonly associated with sun damage.
Hypopigmentation can be caused by hereditary conditions such as vitiligo, melasma, pityriasis versicolor, pityriasis alba, albinism, and fungal infections. [ 4 ] Hyperpigmentation results from an increase in melanin synthesis, which is mostly brought on by sun exposure, dermatological disorders, hormones, aging, genetic factors, skin injuries ...
Hypopigmentation Pallor is a pale color of the skin that can be caused by illness, emotional shock or stress, stimulant use, or anemia , and is the result of a reduced amount of oxyhaemoglobin and may also be visible as pallor of the conjunctivae of the eyes on physical examination.
Postinflammatory hypopigmentation is a highly prevalent pigmentary disease. It can happen to any type of skin. Nonetheless, individuals with darker skin seem to have it more frequently and visibly, perhaps due to the color contrast with their natural skin. The incidence of postinflammatory hypopigmentation is the same for both sexes. [2]
Nevus depigmentosus is a loss of pigment in the skin which can be easily differentiated from vitiligo.Although age factor has not much involvement in the nevus depigmentosus but in about 19% of the cases these are noted at birth.
Poikiloderma vasculare atrophicans (PVA), is a cutaneous condition (skin disease) characterized by hypo- or hyperpigmentation (diminished or heightened skin pigmentation, respectively), telangiectasia and skin atrophy. [3] [4] [5] Other names for the condition include prereticulotic poikiloderma and atrophic parapsoriasis. [6]
Griscelli syndrome is defined by the characteristic hypopigmentation, with frequent pyogenic infection, enlargement of the liver and spleen, a low blood neutrophil level, low blood platelet level, and immunodeficiency. Very often there is also impaired natural killer cell activity, absent delayed-type hypersensitivity and a poor cell ...