Pityriasis

Pityriasis
Classification and external resources
ICD-9-CM	696.5
MeSH	D010915

Pityriasis commonly refers to flaking (or scaling)^[1] of the skin. The word comes from the Greek πίτυρον "bran".

Classification

Types include:

Pustular	Generalized pustular psoriasis (Impetigo herpetiformis) Acropustulosis/Pustulosis palmaris et plantaris (Pustular bacterid) Annular pustular psoriasis Localized pustular psoriasis

Other	Guttate psoriasis Psoriatic arthritis Psoriatic erythroderma Drug-induced psoriasis Inverse psoriasis Napkin psoriasis Seborrheic-like psoriasis

Lichen planus	configuration Annular Linear morphology Hypertrophic Atrophic Bullous Ulcerative Actinic Pigmented site Mucosal Nails Peno-ginival Vulvovaginal overlap synromes with lichen sclerosus with lupus erythematosis other: Hepatitis-associated lichen planus Lichen planus pemphigoides

Other	Lichen nitidus Lichen striatus Lichen ruber moniliformis Gianotti–Crosti syndrome Erythema dyschromicum perstans Idiopathic eruptive macular pigmentation Keratosis lichenoides chronica Kraurosis vulvae Lichen sclerosus Lichenoid dermatitis Lichenoid reaction of graft-versus-host disease

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