Diagnostic validation of capillary electrophoresis analysis of tcell receptor gammachain gene rearrangements. About forty years has passed since brocq united under the name parapsoriasis a group of diseases belonging to. Jul 08, 2014 parapsoriasis describes a group of skin diseases that can be characterized by scaly patches or slightly elevated papules andor plaques red, scaly patches that have a resemblance to psoriasis. Otros diagnosticos diferenciales incluyen eccema cronico, eccematide y psoriasis.
The prognosis of smallplaque parapsoriasis is generally good. Large plaque parapsoriasis are skin lesions that may be included in the modern scheme of cutaneous conditions described as parapsoriasis. Occasion may arise when nothing is more difficult in dermatology than a differentiation between parapsoriasis and allied conditions which are similar both clinically and histologically. Dr mark duffill, dermatologist, waikato hospital, hamilton, new zealand, 2001. Hypopigmented parapsoriasis en plaque, a new, overlooked member of the parapsoriasis family. The topic parapsoriasis en plaques you are seeking is a synonym, or alternative name, or is closely related to the medical condition largeplaque parapsoriasis. Other conditions sometimes grouped under the banner of parapsoriasis are pityriasis lichenoides et varioliformis acuta, pityriasis lichenoides chronica, and lymphomatoid papulosis, all of which are the subjects of separate chapters. Parapsoriasis genetic and rare diseases information center.
Pdf parapsoriasis is a dermatological term for a group of chronic erythematosquamous skin disorders, which share similar clinical features and. 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. It is caused by an abnormal inflammation of the skin. Parapsoriasis dermatologic disorders merck manuals.
Request pdf hypopigmented parapsoriasis en plaque, a new, overlooked member of the parapsoriasis family. Parapsoriasis en plaque definition of parapsoriasis en. Differential diagnosis of parapsoriasis jama dermatology. Interestingly, two of these lesions with a benign phenotype parapsoriasis en plaque and dermatitis were taken from a patient who was diagnosed with tcell lymphoma 89 years later. Young male with long standing erythematosquamous lesions. Parapsoriasis with plaques parapsoriasis with larger plaques transforms into cutaneous tcell lymphoma in about 10% of patients per decade. Small plaque parapsoriasis characteristically occurs with skin lesions that are round, oval, discrete patches or thin plaques, mainly on the trunk 452. Parapsoriasis definition of parapsoriasis by medical dictionary. 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. Age and sex distribution smallplaque parapsoriasis is a rare skin condition that is typically seen in middleaged to older adults in the age group of 3060 years. These lesions, called plaques, may be irregularly roundshaped to oval and are 10 cm 4 in or larger in diameter. An evaluation of the treatment of parapsoriasis with. Plaque parapsoriasis is a skin condition that resembles psoriasis.
They are considered to be lymphoproliferative in origin, as a number of patients progress to cutaneous tcell lymphoma or mycosis fungoides. Eldarouti et al reported on a 7year study of a hypopigmented disorder that the researchers believe should be classified as a new variant of parapsoriasis en plaque. Sep 04, 2019 eldarouti ma, fawzy mm, hegazy ra, abdel hay rm. Confusingly, the term parapsoriasis en plaque has been used for either spp or lpp. The treatment of parapsoriasis with phototherapy 62 patients when disease progression was assessed in patients between one and eight years after treatment, 4662 reported that they were cured of their lesions, exhibiting no lesions at the time they were contacted. For example, it can develop into cutaneous tcell lymphoma. Xanthoerythrodermia perstans is a distinct variant with lesions that are yellow in color 452. Eldarouti ma, fawzy mm, hegazy ra, abdel hay rm j am acad dermatol 2012 dec. However, this description includes several inflammatory cutaneous diseases that are unrelated with respect to pathogenesis, histopathology, and. Parapsoriasis is a term encompassing several disorders of the skin that possess a similar clinical presentation to psoriasis. It is also known as chronic superficial dermatitis, small plaque parapsoriasis and digitate. A report of 34 patients and a 7year experience background. Parapsoriasis retiforme extensa o micosis fungoide. The skin lesions appear as scaly patches and plaques.