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 cuticle, animal coverings, such as the arthropod exoskeleton, have diffe ...
. 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
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Pityriasis lichenoides chronica
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Pityriasis lichenoides et varioliformis acuta
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Pityriasis rosea
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Pityriasis circinata
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Pityriasis rubra pilaris
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Pityriasis versicolor
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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
Many skin conditions affect the human integumentary system—the organ system covering the entire surface of the body and composed of skin, hair, nails, and related muscle and glands. The major function of this system is as a barrier agai ...
References
External links
Dermatologic terminology
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