Pityriasis commonly refers to flaking (or scaling)
of the
skin
Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation.
Other animal coverings, such as the arthropod exoskeleton, have different de ...
. The word comes from the Greek πίτυρον "
bran
Bran, also known as miller's bran, is the hard outer layers of cereal grain. It consists of the combined aleurone and pericarp. Corn (maize) bran also includes the pedicel (tip cap). Along with germ, it is an integral part of whole grains, ...
".
Classification
Types include:
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Pityriasis alba
Pityriasis alba is a skin condition, a type of dermatitis, commonly seen in children and young adults as dry, fine-scaled, pale patches on the face. It is self-limiting and usually only requires use of moisturizer creams.
The condition is so name ...
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Pityriasis lichenoides chronica
Pityriasis lichenoides chronica is an uncommon, idiopathic, acquired dermatosis, characterized by evolving groups of erythematous, scaly papules that may persist for months. Freedberg, et al. (2003). ''Fitzpatrick's Dermatology in General Medicin ...
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Pityriasis lichenoides et varioliformis acuta
Pityriasis lichenoides et varioliformis acuta is a disease of the immune system. It is the more severe version of pityriasis lichenoides chronica. The disease is characterized by rashes and small lesions on the skin. The disease is more common in ...
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Pityriasis rosea
Pityriasis rosea is a type of skin rash. Classically, it begins with a single red and slightly scaly area known as a "herald patch". This is then followed, days to weeks later, by an eruption of many smaller scaly spots; pinkish with a red edge i ...
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Pityriasis circinata
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Pityriasis rubra pilaris
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Pityriasis versicolor
Pityriasis commonly refers to flaking (or scaling) of the skin. The word comes from the Greek πίτυρον "bran".
Classification
Types include:
* Pityriasis alba
* Pityriasis lichenoides chronica
* Pityriasis lichenoides et varioliformis ac ...
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Dandruff
Dandruff is a skin condition that mainly affects the scalp. Symptoms include flaking and sometimes mild itchiness. It can result in social or self-esteem problems. A more severe form of the condition, which includes inflammation of the skin, ...
, historically called ''Pityriasis capitis''
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Pityriasis amiantacea
See also
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Desquamation
Desquamation occurs when the outermost layer of a tissue, such as the skin, is shed. The term is . Physiologic desquamation
Keratinocytes are the predominant cells of the epidermis, the outermost layer of the skin. Living keratinocytes reside in ...
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List of cutaneous conditions
References
External links
Dermatologic terminology
{{cutaneous-condition-stub