pit·y·ri·a·sis

(pĭt′ĭ-rī′ə-sĭs)

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.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pityriasis

(ˌpɪtəˈraɪəsɪs)

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]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

pit•y•ri•a•sis

(ˌpɪt əˈraɪ ə sɪs)

n.

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:

Noun

pityriasis - 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

Translations

pitiriasi

pityriasis

n pitiriasis f; — alba pitiriasis alba; — rosea pitiriasis rosada; — versicolor pitiriasis versicolor

Mentioned in

References in periodicals archive

[1] Primary erythroderma arises on normal looking skin due to an underlying systemic disorder including malignancy or because of a drug reaction, while secondary erythroderma arises from pre-existing dermatoses like psoriasis, atopic dermatitis, Pityriasis rubra pilaris and actinic dermatosis.

A CLINICO-AETIOLOGICAL STUDY OF CASES OF ERYTHRODERMA ATTENDING TERTIARY CARE HOSPITAL IN NORTH-EAST INDIA

Among all, 112 pieces of data were psoriasis, 61 seboreic dermatitis, 72 lichen planus, 49 pityriasis rosea, 52 cronic dermatitis and 20 pityriasis rubra pilaris. It was also discovered that the database contains 34 attributes, 33 of which were linear valued and one of them was nominal.

Skin Diseases Predictive Model Using Individual Base and Ensemble Base Approach

An association between HS and several other inflammatory and genetic disorders have also been reported in the literature, including acne conglobata, spondyloarthropathies, pyoderma gangrenosum, synovitis-acne-pustulosis-hyperostosis-osteitis syndrome, Dowling-Degos disease, fox den disease, florid steatocystoma multiplex, pyoderma vegetans, and pityriasis rubra pilaris (6-14).

Characteristics of inflammatory eye disease associated with hidradenitis suppurativa

Erythemato-squamous diseases to be classified include pityriasis rubra pilaris, seborrheic dermatitis, psoriasis, lichen planus, chronic dermatitis, and pityriasis rosea.

Fuzzy Neural System Application to Differential Diagnosis of Erythemato-Squamous Diseases

The differential diagnosis for erythroderma includes psoriasis, drug reaction, atopic dermatitis (AD), pityriasis rubra pilaris, and CTCL, with AD, drug eruption, and psoriasis being most common.

Mycosis Fungoides Involving the Dorsal Tongue

Choate cited other recent developments, including the discovery that familial pityriasis rubra pilaris is caused by mutations in CARD 14, which is a known activator of nuclear factor kappa B signaling (Am J Hum Genet.

New genetic causes of ichthyosis likely to emerge

The patient was given a diagnosis of pityriasis rubra pilaris (PRP) based on her distinctive clinical presentation.

Widespread erythematous skin eruption

While CTCL is the biggie in the differential diagnosis of very-late-onset atopic dermatitis, other conditions that need to be considered include psoriasis, contact dermatitis, pityriasis rubra pilaris, and pityriasis rosea.

Elderly-onset atopic dermatitis is on the rise

Other dermatological conditions which may give rise to hyperkeratosis include lichen planus and pityriasis rubra pilaris. The former is characterised by itchy, purple, flat topped papules around the ankles and wrists of adults.

Hyperkeratosis of the foot: part 1

In particular lymphoma; hereditary disorders (ichthyosis, pityriasis rubra pilaris); various types of eczema, pemphigus, lichen planus, dermatophytosis, scabies, and dermatomyositis; and autoimmune diseases in general usually offer characteristic histopathologic findings.

Breast cancer presenting as paraneoplastic erythroderma: an extremely rare case