Matthys: Papulosquamous Diseases 1 Flashcards
what does papulosquamous mean?
-a morphologic term used to describe a specific class of dermatologic conditions containing mainly papules and scale in their diagnostic description
Psoriasis vulgaris
- chronic inflammatory scaling eruption
- remissions and exacerbations
- 10% will suffer with psoriatic arthritis
- pustular and erythrodermic flares
patho PV
- immune bsed T cell driven rxn
- Environment- smoking, sun, alcohol
- Genetic HLA B-13 auto dominant
causes of PV
-trauma
-infection
Scaly white plaques over elbows/knees
-sunlight/drugs
Seborrheic dermatitis
- scalp/face/chest
- P. ovale
- Humidity, trauma, seasons
- HIV
Path of SD
- abnormal immune response to P. Ovale with normal amount of the yeast
- FFA release
What does SD look like?
- Branny greasy red scale on face/chest/penis
- mild flaking inhair baring areas
- sebopsoriasis
Erythrasma
- Corynebacterium minutissimum: gram+ rod, part of normal skin flora
- chronic
- diabetes
- warm humid places
path of Erythrasma
- bacterial infection affecting the intertriginous areas (toes, groin, axilla)
- red/brown scaly macules with an erosive collarette-like scale
- WOOD’s LAMP
What can we confuse erythrasma with if it’s under the boob?
-yeast infection
Lichenoid eruptions
- lichen planus
- cell mediated immune response of unkown origin
Lichen planus
- Hep C
- 30-60
- painful burning
- wrists, nails, oral cavity, genitalia, SCC of oral mucosa
- WICKHAM’S STRIA
- pruritic, purple, papules and plaques
What might we confuse lichen planus with if it’s in the mouth?
-candidiasis…. Lichen planus was hella red
If we see Lichen planus on the penis, is it contagioius?
- no!
- it’s not an STI
Pityriasis Rosea
- rose or pink colored scaly pathces or thin plaques
- weird because it comes in spring and fall
