Dermatologic Disorders Flashcards Preview

USMLE Step Two > Dermatologic Disorders > Flashcards

Flashcards in Dermatologic Disorders Deck (66)
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1

side effects of oral isoretinoin

teratogen, hepatotoxicity, hypertriglyceridemia, pancreatitis, suicidal ideation

2

adverse effect of combining oral isoretinoin with tetracycline

pseudotumor cerebri

3

treatment for necrotizing fascitis caused by streptococcus or clostridia

penicillin G +/- clindamycin

4

general empiric treatment of necrotizing fascitis

impinem +/- vancomycin

5

treatment for MRSA skin infections

10-14 day course of:
bactrim + rifampin
clindamycin + rifampin
minocyclin + rifampin
linezolid $$$

6

classic presentation of rosacea

facial erythema with telangiectasias starting at the nose and cheeks
provoked by various stimuli including spicy foods
rhinophyma (sebaceous gland hyperplasia of the nose)

7

treatment for rosacea

topical:
sulfacetamide + sulfur
metro-gel, metronidazole
rhinophyma may require laser therapy

systemic treatment:
tetracycline, doxycycline, or accutane

8

when antibiotics should be used in the treatment of skin abscesses

if abscess is > 5cm or if patient has comorbidities: diabetes, immunocompromised

9

preferred medication in treatment of scabies

permethrin soap
second line: oral ivermectin

10

characteristic features of necrotizing fasciitis

necrosis, purple, woody texture, crepitus, pain extends beyond region of cellulitis

11

treatment for dry gangrene

auto-amputation

12

treatment for wet gangrene

debridement or amputation

13

medication options for treatment of acne vulgaris

first line: topical retinoin
second line: oral/topical antibiotic or benzoyl peroxide
other options: OCPs, spironolactone, or oral isoretinoin for cystic acne

14

time-frame in treatment of varicella

antivirals if within 72 hours

15

side-effects from oral isoretinoin

hepatotoxicitiy, suicidal ideation, teratogenic effects, elevated triglycerides and pancreatitis

16

appearance of molluscum contagiosum

painless shiny papules with central umbilication

17

treatment for molluscum contagiosum

self-limited, most resolve within 3 years
chemical, laser, or cryotherapy for removal
imiquimod will induce inflammatory reaction against lesion

18

treatment for tinea capitis

oral griseofulvin, terbinafine
topical will not work because the tinea is INSIDE the hair follicle

19

lichen planus features

pruritis, purple, polygonal, papules, and plaques
shiny and flat on flexor surfaces
associated with HIV and hepatitis C

20

treatment of lichen planus

topical or intralesional medium to high-potency steroids
acitretin (oral retinoid)

21

stages of decubitous ulcers

stage I: pressure related alteration in intact skin such as change in color, consistency, or temperature
stage II: superficial ulcer, abrasion, or shallow crater
stage III: full thickness skin loss
stage IV: extensive destruction or necrosis, damgage to muscle or bone

22

treatment of decubitous ulcers

address nutrition to help body heal
relieve pressure, soft mattress, elevate heels
debride if necessary with hydrocolloid dressing

23

stasis dermatitis

caused by vascular insufficiency
increased pigmentation, scaly and crusted erosions, ulcers
treat with compressive stockings, elevation of legs, topical steroids, consider horse chestnut seed extract, aspirin to accelerate healing of ulcers

24

medications that cause erythema multiforme

penicillins, sulfonamides, NSAIDs, OCPs, anti-convulsants

25

distinctions between erythema multiforme, stevens-johnson, and TEN

erythema multiforme: target lesions, no sloughing of skin
stevens-johnson: 30% body sloughing, decreased WBC, decreased H/H, elevated LFTs

26

classic presentation of pityriasis rosea

herald patch followed by christmas tree rash 1-2 weeks later

27

treatment for pityriasis rosea

self-limited, consider UV therapy

28

clinical features of pityriasis versicolor

salmon/light brown hypopigmented macules that will scale when scraped off
wood-lamp shows blue-green scales

29

treatment for pityriasis versicolor

ketaconozole, selenium sulfide

30

classic presentation of erythema nodosum

associated with IBD, streptococcus, sarcoidosis
pretibial, tender, painful nodules