Dermatology Flashcards
rough, sandpapery patch in chronic sun-exposed areas
actinic keratosis (AK is NOT OK)
treatment of actinic keratosis
liquid nitrogen, 5-FU, imiquimod
Most common skin cancer
basal cell carcinoma
pearly, translucent lesion with a rolled boarder, may have a central scab/erosion
basal cell carcinoma
treatment of basal cell carcinoma
excision, mohs surgery
red, scaly papule or plaque that is in a sun exposed area. May look like localized eczema but does not itch, may also have a nonhealing ulcer
squamous cell carcinoma
treatment of squamous cell carcinoma
excision
ABCDEs of melanoma
A - asymmetry B - borders C - color D - diameter E - elevation, evolution
what is the best way to diagnose melanoma
excisional biopsy
treatment of melanoma
excision with adequate margins
lesion that appears stuck on and velvety
seborrheic keratosis (SK are OK)
treatment of seborrheic keratosis
none, liquid nitrogen, shave removal
topical medications used for comedomal acne
retinoids, benzol peroxide, salicylic acids, antibiotics
patient blushes with certain triggers like smoking or cold weather, telangectasias are present
rosacea
most common organism that causes folliculitis
S. aureus
most common organism associated with hot tub folliculitis
pseudomonas
papules and pustules in a follicular distribution
folliculitis
eczema or acne-like lesions only appearing around the mouth
perioral dermatitis
common cause of perioral dermatitis
corticosteroid use on the face
double open comedomes, boil like lesions and scaring mainly in axilla and groin
hidradenitis suppertiva
treatment of hidradenitis suppertiva
weight loss, avoid friction, antibacterial cleaners, corticosteroid injections for flares
honey-colored crusting
impetigo
organism most commonly causing impertigo
S. aureus
treatment for impetigo
mupirocin
organisms commonly causing cellulitis
staph or strep
warm erythematous lesion with sharply demarcated raised borders
erysipelas
treatment for erysipelas
penicillin and erythromycin
treatment for furuncles
warm compress, I&D
pearly umbilicated papules
molluscum contagiosum
vesicles grouped on an erythematous base, unilateral, in a dermatomal pattern
herpes zoster
scaly patches and plaques that do not tan in the sun
tinea vesicolor
treatment of tinea vesicolor
topical azoles
beefy red lesions with satellite papules
candida
treatment of candida
topical nystatin or azoles, dry environment and zinc oxide
lower leg lesion that is purple in color and has swelling and pitting edema
stasis dermatitis
treatment of stasis dermatitis
stockings, elevation, weight loss
greasy scale that is orange or red in color, often on scalp and face
seborrheic dermatitis
treatment for seborrheic dermatitis
ketaconazole shampoo
papule that is purple, planar, polygonal and pruritic
lichen planus (5 Ps)
treatment for lichen planus
corticosteroids
rash that starts with a herald patch and then breaks out in smaller lesions in a christmas tree pattern
pityriasis rosea
erythematous plaques with silvery scale
psoriasis
what should you not prescribe to someone with psoriasis
systemic corticosteroids
target lesions
erythema multiforme
percent epidermal detachement in SJS
<10%
treatment of SJS
systemic steroids, supportive care, pain relief, stop causative agent
percent epidermal detachement in TEN
> 30%
well circumscribed area of hair loss, no scarring, exclamation point hairs
alopecia areata
which other medical conditions are associated with alopecia areata
Hashimoto’s and pernicious anemia
treatments for androgenetic alopecia
minoxidil, hair weaves, transplants
onychomoysosis on fingernails should be treated for ____ weeks
6 weeks with lamisil
onychomoyosis on toenails should be treated for ____ weeks
12 weeks with lamisil
acute paronychia is usually caused by which organism
S. aureus
chronic paronychia is usually caused by which organism
Candida
patient with itchy scalp and nits
lice
treatment for lice
permethrin
treatment for lice that has a risk of seizures
lindane
itchy papules/nodules in the web spaces of the fingers
scabies
treatment of scabies
permethrin
symptoms associated with a black widow bite
swelling, generalized pain, dizziness, headache, sweating, N/V
blue gray, cyanotic pastule or vesicle and severe pain about 4 hours after this spider bite
brown recluse
Burn classification: damage to only epidermis, redness and tenderness, no blistering
first degree
Burn classification: involves epidermis and superficial dermis layers, thin walled blisters present
second degree
Burn classification: destroys dermis and epidermis, skin white and leathery
third degree
Burn classification: full thickness of skin, and damage to subcutaneous tissue, muscle and bone
fourth degree
analgesic of choice for burns
morphine
thick, velvety plaques in neck or axillae
acanthosis nigricans
treatment for melasma
hydroquinones
palpable purpura that is non-blanching
vasculitis
must have two negative pregnancy test prior to starting this medication
isotretinoin
bacteria commonly associated with acne
propionibacterium acnes
What dermatologic condition may cause rhinophyma?
rosacea
nikolsky sign
skin peels away in sheets when touched
complication of SJS
vision loss
complication of TEN
diffuse interstitial pneumonitis
exclamation point hair is a sign of…
alopecia areata
most common cause of hair loss in woman
androgenetic alopecia
most common organism to cause onychomyosis of the toenail
trichophytom rubrum
When a patient is on a long dose or oral anti-fungal medication what labs need to be monitored?
LFTs
superficial infection of lateral and posterior skin folds of nail bed
paronychia
most common organism to cause chronic paronychia
candida
most common organism to cause acute paronychia
S. aureus
organism common in cat bites and abx to treat it
Pasturella multocida - augmentin
erythema infectiosum is causative organism
parvovirus B19
other name for erythema infectiosum
fifth disease
slapped cheek rash on face, lacy rash on extremeties
erythema infectiosum (fifth disease)
erythema infectiosum may cause _____ in a patient with sickle cell disease
aplastic crisis
hand foot and mouth disease is caused by which organism
coxsackievirus
how is hand foot and mouth disease spread
direct contact with saliva or mucus
causative agent of measles
paramyxovirus
other name for measles
rubeola
how is measles transmitted
respiratory droplets
patient with cough, coryza, and conjunctivitis that later develops koplik spots and a morbilliform rash - DX?
measles (Rubeola)
how long must a patient isolate when diagnosed with measles
1 week after the rash
Vaccine schedule from measles
MMR shot is given at 12-15 months and then at 4-6 years
antibiotic needed to treat a puncture wound
cipro - for pseudomonal coverage
most common organism to cause erysipelas
S. pyogens (beta hemolytic)
treatment for erysipelas
penicillin (erytho or clinda if allergy)
most common opportunistic infection
candidiasis
white lesions in mouth that bleed when scraped off
oral thrush
treatment of oral thrush
nystatin
organism that causes Tinea versicolor
malassezia furfur
HPV viruses that cause condyloma acuminatum
6 and 11
blanching dendritic lesions in the eye
keratoconjunctivitis (HSV in the eye)
positive HSV result on a Tzanck smear
multinucleated giant cells
dome shaped lesions with a central umbilication
molluscum contaginosum
hutchinson’s sign
shingles on the tip of the nose - concerning for eye involvement
vaccine schedule for varicella
12-15 months and 4-6 years
age recommended for zoster vaccine
50 yo
lesion that is a precursor for squamous cell carcinoma
actinic keratosis
AIDs defining cancer, macular, papular nodules that are brown/red
kaposi sarcoma
most common type of melanoma
superficial spreading
Lichen planus is associated with which type of hepatitis?
hepatitis C
well demarcated erythematous plaque with silver scaling, patient may also complain of joint pain
psoriasis
auspitz sign
bleeds when the scale is picked
koebner’s phenomenon
minor trauma causes new lesion
hyper-pigmented area of sun exposed skin that are usually due to an increase in eczema
melasma
milk white lesion under woods lamp
vitiligo
contraindications for wound closure
bites, deep puncture wounds, tension , active bleeding
most common areas for pressure ulcers
hip and sacrum
how are pressure ulcers prevented
repositioning every 2 hours
patient with chronic venous insufficiency with a hyper-pigmented, erythematous, scaly plaque on their lower extremities
stasis dermatitis
pruritic, tense, symmetric, bullae or urticarial plaques
bullus pemphigoid
velvety, hyper-pigmented, hyperkertotic plaques
acanthosis nigricans
recurrent inflammatory nodules, abscesses, sinus tracts and complex scar formation
hidradenitis suppruativa
slippage sign is found on physical exam of which DX?
lipoma
abscess or sinus tract in the upper part of natal cleft
pilonidal disease
Darier’s sign
urticaria appearing where skin is rubbed
clear, deep seated vesicles typically on palms of hands, looks like tapioca
dyshidrosis