Canadian Medical Guide > Diseases > Skin and Connective Tissue Diseases > Skin Diseases > Skin Diseases, Papulosquamous > Pityriasis Terms and Definitions




Pityriasis

Medical Definition: A name originally applied to a group of skin diseases characterized by the formation of fine, branny scales, but now used only with a modifier. (Dorland, 27th ed)
Guide Notes: a papulosquamous skin dis
Pityriasis Categories.
Canadian Medical Guide Definition Pityriasis Rosea - A mild exanthematous inflammation of unknown etiology. It is characterized by the presence of salmon-colored maculopapular lesions. The most striking feature is the arrangement of the lesions such that the long axis is parallel to the lines of cleavage. The eruptions are usually generalized, affecting chiefly the trunk, and the course is often self-limiting.
Canadian Medical Guide Definition Pityriasis Rubra Pilaris - A chronic skin disease characterized by small follicular papules, disseminated reddish-brown scaly patches, and often, palmoplantar hyperkeratosis. The papules are about the size of a pin and topped by a horny plug.

Pityriasis Medical Definitions and Terms

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