Dermatology

Question 1

Treatment for tender and swollen area on right buttock with central fluctuance and surrounding erythema?

Answer 1

I&D

Question 2

Treatment for dry gangrene?

Answer 2

revascularization and amputation

Question 3

Treatment for wet gangrene?

Answer 3

debridement, hyperbaric O2, amputation

Question 4

42 year old complains of occasional nodules that progress to abscesses in her axilla. Dx and tx?

Answer 4

hidradenitis suppurativa

topical clinda

Question 5

Treatment for gas gangrene?

Answer 5

debridement, amputation, abx

Question 6

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?

Answer 6

s aureus

mupirocin

Question 7

15 year old girl is brought to the dermatologist for treatment of her acne. What is the causative organism in acne?

Answer 7

propionibacterium acne

Question 8

What medication options are available for treatment of acne vulgaris?

Answer 8

retinoic acid, spironolactone, OCP, erythro, clinda, benzoyl peroxide

Question 9

What side effects can arise from the use of oral isotretinoin?

Answer 9

skin drying, teratogenic, photosensitivity, hepatotoxicity, incr triglycerides, depression/SI

Question 10

Treatment for rosacea?

Answer 10

topical: metronidazole, azelaic acid

laser therapy

tetra, doxy, mino, isotretinoin

Question 11

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?

Answer 11

Tzanck smear

viral culture

serology

Question 12

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?

Answer 12

valacyclovir
famciclovir
acyclovir
pain meds
steroids

Question 13

What is the appearance of molluscum contagiosum?

Answer 13

flesh colored umbilicated lesions

Question 14

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?

Answer 14

KOH stain

pseudohyphae

Question 15

What medication ins preferred in the treatment of scabies?

Answer 15

permethrin

Question 16

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?

Answer 16

malassezia furfur

Question 17

Medications that cause erythema multiforme.

Answer 17

PCN
sulfonamides
NSAIDs
OCP
anticonvulsant

Question 18

Distinction between erythema multiforme, stevens-johnson syndrome and toxic epidermal necrolysis?

Answer 18

SJS - involve mucous membrane and sloughing of skin, 30%

erythema multiforme does not involve mucous membrane or sloughing of skin

Question 19

Classic presentation of psoriasis?

Answer 19

papules/plaques with silvery scale
extensor surfaces
auspitz sign (bleed with scrape)

Question 20

Classic presentation of erythema nodosum?

Answer 20

dark raised lesions on anterior shin, painful red subq nodules

Question 21

CLassic presentation of pityriasis rosea? What is the treatment?

Answer 21

herald spot that goes to xmas tree distribution

tx: supportive, UV, acyclovir, erythromycin

Question 22

Classic presentation of lichen planus?

Answer 22

pruritic, purple, polygonal papules and plaques which are flat on flexor surfaces

Question 23

What is the classic appearance of porphyria cutanea tarda?

Answer 23

chronic blistering of sun exposed skin, hypertrichosis, hyperpig, alcohol, Hep C

Question 24

Clinically, how is pemphigus vulgaris be distinguishable from bullous pemphigoid?

Answer 24

pemphigus vulgaris - flaccid blisters, oral bullae, pos nikolsky sign

bullous - tense blisters, not usually oral bullae, neg nikolsky sign

Question 25

Most important prognostic indicator in cases of melanoma?

Answer 25

thickness/depth

Question 26

Classic appearance of basal cell carcinoma?

Answer 26

pearly papule with telangiectasia

Question 27

Classic apperance of squamous cell cancer?

Answer 27

painless well demarcated scaly patch/plaque

Question 28

Dermatologic condition associated with obesity, diabetes, or malignancy

Answer 28

acanthosis nigricans

Question 29

Dermatologic condition caused by complete lack of melanocytes

Answer 29

vitiligo

Question 30

Dermatologic condition with dark skin discoloration that is particularly common in pregnant women

Answer 30

melasma

Question 31

Dermatologic condition with hair loss associated with effects of dihydrotestosterone on hair follicles

Answer 31

androgen alopecia

Question 32

Dermatologic condition with black velvety plaques on flexor surfaces and intertriginous areas

Answer 32

acanthosis nigricans

Question 33

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?

Answer 33

TSH

Question 34

Type of vascular anomaly with purple red lesion on face that does not regress with age

Answer 34

port wine stain

Question 35

Type of vascular anomaly with infant with bright red lesion that regresses over months to years

Answer 35

infantile (strawberry) hemangioma

Question 36

Type of vascular anomaly with benign small red papule that appears on skin with age

Answer 36

cherry hemangioma

Question 37

Type of vascular anomaly with bright red papule with radiating blanching vessels

Answer 37

spider angiomata

Question 38

Type of vascular anomaly with blue compressible mass that does not regress

Answer 38

cavernous hemangioma

Question 39

Type of vascular anomaly with red pink nodule on a child that is often confused with melanoma

Answer 39

spitz nevus

Question 40

Treatment for a newborn with an uncomplicated strawberry hemangioma?

Answer 40

no treatment observe oral propranolol

Question 41

What name is given to diffuse stress-related hair loss? What is the treatment?

Answer 41

telogen effluvium reassurance and avoiding stress

Question 42

rash described as dew drops on a rose petal?

Answer 42

primary varicella (chickenpox)

Question 43

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?

Answer 43

Dx: cutaneous anthrax tx: PCN V, PCN G, azi, doxy

Question 44

First line treatment for pediculosis capitis and pediculosis pubis?

Answer 44

permethrin

Question 45

congenital infection presenting with blueberry muffin rash?

Answer 45

rubella

Question 46

child has flesh colored umbilicated lesions to the face. What are those lesions, where do they appear in adults?

Answer 46

molluscum contagiosum genitals