A continuum is thought to exist:
Chronic dermatitis ---> Parapsoriasis
---> T cell lymphoma (mycosis fungoides)
Parapsoriasis may be defined thus
1. Plaque-type (usually elderly and on legs;
circinate patches may be red, yellow, brown, pink; plaques tend to be thin)
(sometimes
called chronic scaly superficial dermatitis)
.. Small plaque
.. Large plaque
2. Lichenoid
.. Pityriasis
lichenoides
.... acute
.... chronic
Most cases aren't
painful or itchy
If this is part of DDx
-> consider punch biopsies to exclude a T cell lymphoma
Else histology changes
tend to be non-specific
Emollients very
important to hydrate skin
Otherwise,Rx tends to be
that for dermatitis, including topical c.steroids and UV therapy
Always a good reference
site, I find ...
emedicine.medscape.com/article/1107425-overviewApr
19, 2013 - Parapsoriasis describes a group of cutaneous diseases that can be characterized by scaly patches or slightly elevated papules
DDx includes
- dermatitis (particularly circinate/nummular type)
- psoriasis (plaque or guttate form)
- T cell lymphoma (mycosis fungoides)
- Pityriasis rosea
- Syphylis (secondary)
DDx includes
- dermatitis (particularly circinate/nummular type)
- psoriasis (plaque or guttate form)
- T cell lymphoma (mycosis fungoides)
- Pityriasis rosea
- Syphylis (secondary)
--> biopsies
--> ?syphylis serology
