Dermatology Flashcards
Treatment for tender and swollen area on right buttock with central fluctuance and surrounding erythema?
I&D
Treatment for dry gangrene?
revascularization and amputation
Treatment for wet gangrene?
debridement, hyperbaric O2, amputation
42 year old complains of occasional nodules that progress to abscesses in her axilla. Dx and tx?
hidradenitis suppurativa
topical clinda
Treatment for gas gangrene?
debridement, amputation, abx
7 year old boy is brought to the country clinic with a rash. The mother denies that the child has acted ill. The exam is unremarkable besides perioral honeycrusted lesions and regional LAD. What bacteria is the likely cause? What is the most appropriate tx?
s aureus
mupirocin
15 year old girl is brought to the dermatologist for treatment of her acne. What is the causative organism in acne?
propionibacterium acne
What medication options are available for treatment of acne vulgaris?
retinoic acid, spironolactone, OCP, erythro, clinda, benzoyl peroxide
What side effects can arise from the use of oral isotretinoin?
skin drying, teratogenic, photosensitivity, hepatotoxicity, incr triglycerides, depression/SI
Treatment for rosacea?
topical: metronidazole, azelaic acid
laser therapy
tetra, doxy, mino, isotretinoin
25 year old man is the office for cold sores. On exam, he has a collection of 3 small vesicles at the vermillion border. He says that they are painful. This is the second time he has had these. What studies might be helpful to diagnose this disease?
Tzanck smear
viral culture
serology
An elderly woman presents with a rash on her right flank. She says that the rash appeared a few days ago and followed a recent cataract surgery. The rash is causing her terrible pain. On exam, the rash extends from the spine past the mid-axillary line in a dermatomal distribution. What can be used to treat?
valacyclovir famciclovir acyclovir pain meds steroids
What is the appearance of molluscum contagiosum?
flesh colored umbilicated lesions
Obese 42 year old diabetic woman complains of pruritic rash underneath her breasts. Exam reveals an erythematous patchy rash underneath large, pendulous breasts. What diagnostic study would be helpful and what would be seen?
KOH stain
pseudohyphae
What medication ins preferred in the treatment of scabies?
permethrin
22 year old asian woman comes to your office. She is concerned because she notices small areas of hypopigmentation on her back. More noticeable in the summer. What is the organism that is likely causing her skin condition?
malassezia furfur
Medications that cause erythema multiforme.
PCN sulfonamides NSAIDs OCP anticonvulsant
Distinction between erythema multiforme, stevens-johnson syndrome and toxic epidermal necrolysis?
SJS - involve mucous membrane and sloughing of skin, 30%
erythema multiforme does not involve mucous membrane or sloughing of skin
Classic presentation of psoriasis?
papules/plaques with silvery scale
extensor surfaces
auspitz sign (bleed with scrape)
Classic presentation of erythema nodosum?
dark raised lesions on anterior shin, painful red subq nodules
CLassic presentation of pityriasis rosea? What is the treatment?
herald spot that goes to xmas tree distribution
tx: supportive, UV, acyclovir, erythromycin
Classic presentation of lichen planus?
pruritic, purple, polygonal papules and plaques which are flat on flexor surfaces
What is the classic appearance of porphyria cutanea tarda?
chronic blistering of sun exposed skin, hypertrichosis, hyperpig, alcohol, Hep C
Clinically, how is pemphigus vulgaris be distinguishable from bullous pemphigoid?
pemphigus vulgaris - flaccid blisters, oral bullae, pos nikolsky sign
bullous - tense blisters, not usually oral bullae, neg nikolsky sign
Most important prognostic indicator in cases of melanoma?
thickness/depth
Classic appearance of basal cell carcinoma?
pearly papule with telangiectasia
Classic apperance of squamous cell cancer?
painless well demarcated scaly patch/plaque
Dermatologic condition associated with obesity, diabetes, or malignancy
acanthosis nigricans
Dermatologic condition caused by complete lack of melanocytes
vitiligo
Dermatologic condition with dark skin discoloration that is particularly common in pregnant women
melasma
Dermatologic condition with hair loss associated with effects of dihydrotestosterone on hair follicles
androgen alopecia
Dermatologic condition with black velvety plaques on flexor surfaces and intertriginous areas
acanthosis nigricans
31 year old woman has patches of hypopigmentation on her skin. Considering the associated comorbidities with this condition, what endocrine test might you order initially?
TSH
Type of vascular anomaly with purple red lesion on face that does not regress with age
port wine stain
Type of vascular anomaly with infant with bright red lesion that regresses over months to years
infantile (strawberry) hemangioma
Type of vascular anomaly with benign small red papule that appears on skin with age
cherry hemangioma
Type of vascular anomaly with bright red papule with radiating blanching vessels
spider angiomata
Type of vascular anomaly with blue compressible mass that does not regress
cavernous hemangioma
Type of vascular anomaly with red pink nodule on a child that is often confused with melanoma
spitz nevus
Treatment for a newborn with an uncomplicated strawberry hemangioma?
no treatment
observe
oral propranolol
What name is given to diffuse stress-related hair loss? What is the treatment?
telogen effluvium
reassurance and avoiding stress
rash described as dew drops on a rose petal?
primary varicella (chickenpox)
Patient presents with a painless, pruritic papule with regional LAD that evolves over 7-10 days into a necrotic ulcer with a black eschar. What is the diagnosis and treatment?
Dx: cutaneous anthrax
tx: PCN V, PCN G, azi, doxy
First line treatment for pediculosis capitis and pediculosis pubis?
permethrin
congenital infection presenting with blueberry muffin rash?
rubella
child has flesh colored umbilicated lesions to the face. What are those lesions, where do they appear in adults?
molluscum contagiosum
genitals
