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n. pl. pit·y·ri·a·ses (-sēz′)
Any of various skin diseases of humans and animals, characterized by epidermal shedding of flaky scales.

[Greek pitūriāsis, from pitūra, grain husks, bran, dandruff, perhaps from dissimilation of *putūra; see pau- in Indo-European roots, or akin to pitulos, repetitive striking; see pet- in Indo-European roots.]


1. (Pathology) any of a group of skin diseases characterized by the shedding of dry flakes of skin
2. (Veterinary Science) a similar skin disease of certain domestic animals
[C17: via New Latin from Greek pituriasis scurfiness, from pituron bran]


(ˌpɪt əˈraɪ ə sɪs)

any of several skin diseases marked by the shedding of branlike scales.
[1685–95; < New Latin < Greek pitȳríāsis branlike eruption =pítȳr(on) bran, scale + -iāsis -iasis]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pityriasis - any of several skin disorders characterized by shedding dry flakes of skinpityriasis - any of several skin disorders characterized by shedding dry flakes of skin
dermatosis - disorder involving lesions or eruptions of the skin (in which there is usually no inflammation)
dandruff - a condition in which white scales of dead skin are shed by the scalp
pityriasis alba - common form of pityriasis (usually in children or young adults) characterized by round patches of depigmentation
pityriasis rosea - pityriasis in which an itchy rash develops over the trunk and extremities


n pitiriasis f; — alba pitiriasis alba; — rosea pitiriasis rosada; — versicolor pitiriasis versicolor
References in periodicals archive ?
Epidermotropic MZL represents a distinctive nosologic B-cell lymphoma that should be considered a diagnostic possibility in older men who present with an unexplained papulosquamous eruption resembling pityriasis rosea," the researchers wrote.
Lichen planus of the nails may ultimately lead to complete nail atrophy and it sometimes manifests itself as 20 nail dystrophy 8 Pityriasis rubra is a rare disabling skin disease which has an effect on the nails which is thickened and there is onycholysis with severe subungual hyperkeratosis and nail splintering.
Widespread infection with HPV is responsible for the development of wart-like lesions and pityriasis versicolor-like spots.
Disorders like lupus erythematosus, lichen planus, psoriasis and pityriasis lichenoides chronica were lumped together as papulosquamous disorders.
Objective: To compare the efficacy of single dose of oral itraconazole 400mg with 1% topical clotrimazole in the treatment of pityriasis versicolor.
AD, SD, and pityriasis versicolor (PV); and comparative analysis with isolates from healthy host.
Pityriasis alba is commonly seen in individuals with dark skin, although it may occur in these patients in the absence of AD.
A diagnosis of pityriasis lichenoides et varioliformis acuta (PLEVA) was established.
The patient was given a diagnosis of pityriasis rubra pilaris (PRP) based on her distinctive clinical presentation.
Pityriasis Rosea: The Afro-Caribbeans show several unusual variations in the features of pityriasis rosea.
Three cases each of chronic bullous disease of childhood, pityriasis rosea, verruca plana and scabies were newly referred and they were all misdiagnosed by referring doctors.