The term parapsoriasis refers to a heterogeneous group of uncommon dermatoses occurring mainly in older adults and characterized by erythematous and scaly patches of variable size, chronic course, and resistance to treatment. Parapsoriasis describes a group of cutaneous diseases that can be characterized by scaly patches or slightly elevated papules andor plaques that have a resemblance to psoriasishence the nomenclature. Parapsoriasis en plaque brocq, largeplaque type, parapsoriasis en plaque brocq, large focal type, parapsoriasis en grandes plaques, premalignant form of parapsoriasis en plaque. Other conditions sometimes grouped under the banner of parapsoriasis are pityriasis lichenoides et varioliformis acuta, pityriasis lichenoides chronica, and lymphomatoid papulosis, all. Whether parapsoriasis represents an early stage of tcell cutaneous lymphoma is still the subject of controversy. Largeplaque parapsoriasis is a common associate of retiform. Large plaque parapsoriasis are skin lesions that may be included in the modern scheme of cutaneous conditions described as parapsoriasis. It is caused by an abnormal inflammation of the skin. The skin lesions appear as scaly patches and plaques.
Smallplaque parapsoriasis and largeplaque parapsoriasis were first described by brocq in 1902 as parapsoriasis en plaques, which referred to round, wellcircumscribed patches, 2to6 cm, that clinically resembled psoriasis. Parapsoriasis en plaques benigne kleinherdige altmeyers. Parapsoriasis is a dermatological term for a group of chronic erythematosquamous skin disorders, which share similar clinical features and possibility of progression to cutaneous tcell lymphoma. Plaque parapsoriasis is a skin condition that resembles psoriasis. Confusingly, the term parapsoriasis en plaque has been used for either spp or lpp. Parapsoriasis dermatologic disorders merck manuals. Lpp and its variants are closely related to the patch stage of mycosis fungoides. Parapsoriasis retiforme extensa o micosis fungoide. Parapsoriasis y poigilodermia vascular atrofiante eprints. Young male with long standing erythematosquamous lesions. An evaluation of the treatment of parapsoriasis with. Parapsoriasis en grandes placas con o sin poiquilodermia. Parapsoriasis refers to one of a group of skin disorders that are characterized primarily by their resemblance to psoriasis red, scaly lesions, rather than by their underlying cause neoplasms can develop from parapsoriasis.
Some people with this form develop a kind of lymphoma. Sie hat allerdings keine nosologische gemeinsamkeit zur klassischen psoriasis. Parapsoriasis is an etiologically heterogeneous group of disorders that tend to have a similar appearancethin, scaling, dull, pink patches and plaques with a slightly atrophic or wrinkled appearance. The lesions can appear on the chest or back, and itching is not commonly observed. Small plaque parapsoriasis characteristically occurs with skin lesions that are round, oval, discrete patches or thin plaques, mainly on the trunk 452. Parapsoriasis describes a group of cutaneous diseases that can be characterized by scaly patches or slightly elevated papules andor plaques dispersed on the trunk or proximal extremities that have a resemblance to psoriasishence the nomenclature.
It is also known as chronic superficial dermatitis, small plaque parapsoriasis and digitate dermatosis. Parapsoriasis xxv congreso seap, xx congreso sec, i. Parapsoriasis symptoms, causes, diagnosis, and treatment information for parapsoriasis parapsoriasis with alternative diagnoses, fulltext book chapters, misdiagnosis, research. The term parapsoriasis was used by brocq 1902 to group a number of conditions previously described under different names. Muche jm, lukowsky a, heim j, friedrich m, audring h, sterry w 1999 demonstration of frequent occurrence of clonal t cells in the peripheral blood but not in. Parapsoriasis trastornos dermatologicos manual msd version. Parapsoriasis genetic and rare diseases information. We evaluated the efficacy of phototherapy in the treatment of parapsoriasis and its relation with tccl. Over time, the classification of these entities has been refined and further elucidated by several authors, who. Xanthoerythrodermia perstans is a distinct variant with lesions that are yellow in color 452 digitate dermatosis is a distinct variant with lesions in the shape of a finger and distributed symmetrically on the flanks. The topic parapsoriasis en plaques you are seeking is a synonym, or alternative name, or is closely related to the medical condition largeplaque parapsoriasis. Parapsoriasis is a peculiar reaction pattern of the skin that appears to have a spectrum with small plaque parapsoriasis at one end and large plaque at the other.
However, this description includes several inflammatory cutaneous diseases that are unrelated with respect to pathogenesis, histopathology, an. Patients diagnosed with parapsoriasis and treated with phototherapy puva or. Answer largeplaque parapsoriasis is marked by rashes that are bigger and sometimes irregularly shaped. Largeplaque parapsoriasis lpp is observed as yellowish patches on the skin measuring over 5 cm in size. These lesions, called plaques, may be irregularly roundshaped to oval and are 10 cm 4 in or larger in diameter. Parapsoriasis en plaque definition of parapsoriasis en. Dermis parapsoriasis en plaque brocq, largeplaque type. Parapsoriasis en grandes placas pgp epidemiologia predomina en varones 2. Zum ausschluss einer mycosis fungoides sollte eine biopsie erfolgen. However, this description includes several inflammatory cutaneous diseases that are unrelated with respect to pathogenesis, histopathology, and response to treatment. They can be very thin plaques that are asymptomatic or mildly pruritic. Large plaque parapsoriasis lpp is an idiopathic, chronic scaly dermatosis classified within parapsoriasis group of diseases, occurring commonly in middle aged patients of all races and geographic regions.
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