Skin conditions 3 and 4 Flashcards
(118 cards)
molluscum contagiosum
- common pediatric virus
- replicates in epithelial cells
- usually affects young kids, sexually active adults and immunosuppressed
what causes molluscum contagiosum
- poxvirus MCV 1-4
how is molluscum contagiosum spread
- direct skin to skin contact
- gym equipment
- autoinnoculation
si/sx of molluscum contagiosum
- non pruritic
- flesh colored dome shaped papules
- has punctum in middle
- curd like material
- usually on face, trunk, extremities, groin
differential dx for molluscum contagiosum
- warts
- milia- epidermal like cyst
treatment of molluscum contagiosum
- usually not necessary
- self limited
- take months- yr to recover
- contagious the entire time there is a lesion
non genital verruca
- aka warts
- more than 100 human papillomaviruses
- can occur anywhere
verruca vulgaris
- aka common wart
- usually ages 5-20
- risk with frequent exposure to water
- hands and palms, periungunal, nail folds
- papules with rough gray surface
verruca planta
- aka flat wart
- usually kids and young adults
- flat topped flesh colored papules
- grouped together on face, neck, wrist, hands
verruca plantaris
- aka plantar wart
- appear on sole of feet
- usually at pressure points on ball of foot or heel
- can be grouped together- “mosaic wart”
diagnosis of verruca
- clinical exam
- punch biopsy
treatment for verruca
- no treatment
- 65% regress spontaneously in 2 yrs
- tx recommended for pts with extensive, spreading or symptomatic warts
- cryotherapy
- salicylic acid/ cantharidin
- occlusive dressing
- intralesional inj of bleomycin
what causes tinea versicolor
- malassezia furfur (yeast)
- more common in humid climates
si/sx of tinea versicolor
- hypo or hyperpigmented macules that do not tan
- asymptomatic
- usually noticed in summer bc of tan
- well defined round macules with scaling on trunk, arms, face
dx of tinea versicolor
- KOH scraping -> hyphae and sports “spaghetti and meatballs”
- woods light -> orange mustard color
differential dx for tinea versicolor
- vitiligo
- difference= vitiligo is complete depigmentation with no scaling
treatment for tinea versicolor
- selenium sulfide shampoo daily
- topical ketoconazole cream
- PO ketoconazole- caution LFTs
tinea corporis
- aka ring worm
- aquired by contact with organism
- increased risk with wrestlers
si/sx of tinea corporis
- annular lesions with peripheral enlargement
- central clearing
- scaly active boarder
- asymmetrical distribution
- usually on face, trunk, extremities
- pruritic or asymptomatic
differential dx of tinea corporis
- acute lyme disease
- difference= no scaling
treatment for tinea corporis
- topical naftin or ketoconazole
tinea pedis
- common in young men d/t sweaty work boots
- moccasin distribution
si/sx of tinea pedis
- scale and maceration in toe web spaces
- moccasin distribution on plantar surface
- distinct boarder
- pruritic feet
- inflammation and fissures possible
diagnosis of tinea pedis
- KOH or fungal culture