TL;DR: It is the author’s opinion that large plaque parapsoriasis should not be classified as mycosis fungoides, because this would be inconsistent with other dermatologic nomenclature, in which other potentially pre-cancerous conditions are not diagnosed as cancer.
Abstract: Evidence for and against the hypothesis that inflammatory dermatoses may progress to mycosis fungoides or Sezary syndrome is reviewed, and two cases which may represent examples of such a progression are presented. Arguments for and against the hypothesis that large plaque parapsoriasis, retiform parapsoriasis, or both, should be classified as mycosis fungoides are discussed. It is the author’s opinion that large plaque parapsoriasis should not be classified as mycosis fungoides, because it may only represent one of several inflammatory dermatoses that may progress to MF, because cell marker studies show these lymphocyte populations to be different, because this would be inconsistent with other dermatologic nomenclature, in which other potentially pre-cancerous conditions are not diagnosed as cancer, and because further investigations may provide information which allows us to distinguish between those cases of large plaque parapsoriasis which are progressing to mycosis fungoides and those which are not.
TL;DR: An ichthyosiform LPP is reported for its rarity and is closely related to the patch stage of mycosis fungoides.
Abstract: 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. LPP and its variants are closely related to the patch stage of mycosis fungoides. The two types of LPP mostly described are the poikilodermatous and retiform parapsoriasis. We are reporting an ichthyosiform LPP for its rarity.
TL;DR: A case of an older man with wide compromise of body superface area of parapsoriasis retiform, characterized by present like milimetric papules that confluid to form eritemato-violaceous plaques that have between poikilodermatous skin is presented.
Abstract: Retiform parapsoriasis is a very rare variety of large plaque parapsoriasis. It was also considerate by some authors like a premycotic state. This entity its characterized by present like milimetric papules that confluid to form eritemato-violaceous plaques that have between poikilodermatous skin. We present a case of an older man with wide compromise of body superface area. Key word. Parapsoriasis retiform. Mycosis fungoides. T cutaneous lymphoma.