Difference between revisions of "Pityriasis rubra pilaris"

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| Micro      = alterating [[orthokeratosis]] and [[parakeratosis]] (known as "checkerboard pattern"), marked uniform [[acanthosis]] with broad dermal papillae and broad epidermal ridges, , +/-eosinophils (common), follicular plugging, scattered foci of [[acantholysis]] (common), occasional mild spongiosis
| Micro      = alterating [[orthokeratosis]] and [[parakeratosis]] (known as "checkerboard pattern"), marked uniform [[acanthosis]] with broad dermal papillae and broad epidermal ridges, , +/-eosinophils (common), follicular plugging, scattered foci of [[acantholysis]] (common), occasional mild spongiosis
| Subtypes  =
| Subtypes  =
| LMDDx      = [[Dermatomycosis|fungal infection]], Psoriasis, Darier disease, seborrhoeic dermatitis
| LMDDx      = [[Dermatomycosis|fungal infection]], [[psoriasis]], [[Darier disease]], [[seborrhoeic dermatitis]]
| Stains    = PASD -ve (to r/o fungal infections)
| Stains    = PASD -ve (to r/o fungal infections)
| IHC        =
| IHC        =
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| Assdx      = HIV infection - recalcitrant PRP
| Assdx      = HIV infection - recalcitrant PRP
| Syndromes  =
| Syndromes  =
| Clinicalhx = Classic adult - self-limited exfoliative, erythematous dermatitis that starts over the head and neck and extends downwards forming orange plaques with spared islands of normal skin, follicular hyperkeratosis, palmar involvement with orange hyperkeratosis.
| Clinicalhx = Classic adult - self-limited exfoliative, erythematous dermatitis that starts over the head and neck and extends downwards forming orange plaques with spared islands of normal skin, follicular hyperkeratosis, palmar involvement with orange hyperkeratosis
| Signs      =
| Signs      =
| Symptoms  =
| Symptoms  =
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==Associated Diagnoses==
==Associated Diagnoses==
*HIV infection - recalcitrant PRP
*[[HIV infection]] - recalcitrant PRP.


===Images===
===Images===
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[[Category:Diagnosis]]
[[Category:Diagnosis]]
[[Category:Dermatopathology]]
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