Derm Flashcards
how to test for fungi and dermatophytes
KOH exam
how to test for herpes/varicella zoster
Tzanck test (cytologic test)
how to test for tinea versocolor
wood light examination
how to test for scabies
skin scrapings
how do you treat acne in infants
YOU DONT
pustule formation results from proliferation of what bacteria
propionibacterium acnes
coag negative staph
yeast malassezia furfur
treatment for acne first line monotherapy
topical retinoids (tretinoin, adapalene, tazarotene)
what treatment can you add to topical retinoids
benzoyl peroxide
cause of ichthyosis
ichthyosis vulgaris
treatment for ichthyosis
ammonium lactate
treatment of atopic dermatitis
emollients/lubricants (aquaphor, cetaphil, eucerin, vaseline) (not lotions)
steroid creams/ointments
dyshydrotic eczema manifests as
pruritic vesicular rash of hands/feet
treatment of dyshydrotic eczema
high potency topical steroids
antiperspirants
Stratum corneum compromise
Direct chemical irritation of epidermis
irritant contact dermatitis
treatment of irritant contact dermatitis
clean and dry
treatment for allergic contact dermatitis
corticosteroids (topical or systemic)
Greasy, yellow (or salmon) colored, scaling lesions lesions. Non-pruritic “cradle cap”
seborrheic dermatitis
treatment for seborrheic dermatitis
topical steroids, antiseborrheic shampoos
two pigmented lesions associated with systemic disease
Cafe au lait- neurofibromatosis (greater than 6 & axillary)
Ash leaf
Mongolian Spots
Melanocytic Nevi
Salmon patches, nevus simplex, port-wine stain
Hemangiomas
Birthmarks
giant melanocytic nevi can develop into
malignant melanoma
Flat slate grey to blue
Usually lumbrosacral, buttocks –can be elsewhere
Accumulation of melanocytes
Mongolian spots
Cutaneous distribution of port wine stain,
1st branch of trigeminal nerve
Sturge Weber syndrome
Salmon patches, vascular, fade away
hemangiomas
Well demarcated, erythematous, scaly papules and plaques
Psoriasis
Treatment for psoriasis
topical steroidsCoal tar, Sunlight, moisturizers, methotrexate in diffuse or pustular cases
skin disorder with Herald patch
with cleavage lines (christmas tree distribution)
Pityriasis Rosea
treatment of pityriasis rosea
NONE (can use antihistamines, low potency steroids)
“honey colored crust”with red base, often nasolabial area
impetigo
causative agent for impetigo
staph aureus
GAS can cause it too
treatment of impetigo
Anti-staph antibiotic (cephalexin effective for strep, MSSA; clindamycin for all strep and staph). Mupirocin (Bactroban®) or retapamulin (Altabax®) if disease is localized
treatment of bullous impetigo
systemic antibiotics
complication of impetigo
Acute Post-streptococcal Glomerulonephritis (APSGN)
Cause of cellulitis/abscess
staph, if streaking then strep
cause of staph scalded skin
staph aureus
Annular or nummular scaling red plaques
Often with “trailing scale”
Pruritic
tinea corporis
treatment of tinea corporis
Topical imidazoles (clotrimazole, miconazole, econazole, NOT nystatin)
ring like lesions to be aware of
granuloma annulare nummular eczema erythema chronicum migrans staph impetigo erythma multiforme
treatment of tinea capitis
Topical treatment is ineffective (azoles dont work)
Griseofulvin or other oral medications
something looks like tinea pedis in kids… what most likely is it?
Eczema, or juvenille plantar dermatosis
treatment tinea cruris and pedis
topical azoles
treatment for tinea versicolor
selenium sulfide
topical antifungals
satellite lesions in the diaper are classic for
candidia
treatment for candida
nystatin
causative agent of warts
HPV
treatment for flat warts
Retin-A
treatment for verrucous warts
freezing
keratolytics (salicylic acid)
cause of moluscum contagiosum
MCV I, MCV II (pox viruses)
Pearly papules – pinhead to 1 cm in size
Large lesions have central dimple
May have few to hundreds of lesions
Molluscum contagiosum
treatment of molluscum contagiosum
curettage
liquid nitrogen
podophyllin
treatment for scabies
Permethrin
Lindane - not kids <110 lbs
treatment of pediculosis capitis
Permethrin
pyrethrum
shampoos
nit comb
target lesions (bull’s eye), itchy, red, edema, macule –> papule, vesicles, bullae; in exposed areas
erythema multiforme
causes of erythema multiforme
HSV* Mycoplasm pneumonia Other infections, HSV Drug reactions Idiopathic
Severe bullous form of erythema multiforme Includes mucous membranes Conjunctivitis Mouth ulceration PRECEDED BY UPPER RESPIRATORY INFECTION
stevens johnson syndrome
meds that cause SJS
Antibiotics containing penicillin, sulfa or tetracyclines
NSAIDs- including naproxen and ibuprofen
Anticonvulsants - carbamazepine or phenytoin
Drug reaction causing blistering and peeling of skin. Severe form of SJS
Toxic Epidermal Necrolysis
Classic form in adolescence is localized to scalp and intertriginous areas and may include blepharitis and external auditory canal
seborrheic dermatitis
treatment for kawosakis
IVIG, high dose aspirin