Comquest - Derm (20)

Question 1

tense fluid filled bullae = ?

flaccid fluid filled bullae = ?

Answer 1

tense = bullous pemphigoid
flaccid = pemphigus vulgaris (anti-desmoglein 1,3; IgG)

Question 2

shiny polygonal papules on flexor surfaces. assoc wih HepC, MG, PBS, UC

Answer 2

lichen planus

Question 3

thick white polygonal papules, esp genital region

Answer 3

lichen sclerosis

Question 4

Newborn rash that does not cover palms or soles. Sampling reveals eosinophilia.

Answer 4

erythema toxicum neonatorum

Question 5

dx?
non-pigmented, erythematous, scaly. in sun exposed areas
next step?

Answer 5

actinic keratosis

next step os cryotherapy

Question 6

dx?

firm, smooth, hyperkeratotic papule or plaque with central ulceration that may bleed with trauma and will not heal

Answer 6

SCCarcinoma

Question 7

surgical excision of suspicious melanoma at what mm?

Answer 7

4mm

Question 8

define dyshidrotic eczema

Answer 8

recurrent vesicular pruritic eruptions on palms, fingers, soles

Question 9

8yo with acne. what drug is contraindicated in

Answer 9

doxycycline

Question 10

prophylactic DoC for uncomplicated animal bites

Answer 10

amoxicillin-clavulanate (covers Bacteroides, Fuscobacteria, and Pasteurella) –> Gneg and anaerobes

Question 11

• appropriate management for a CLEAN animal bite in a rabies-immunized animal, but human with unknown-vaccination history
• appropriate management for a soiled animal bite in a rabies-immunized animal, but human with unknown-vaccination history

Answer 11

clean - tetanus toxoid

dirty - tetanus toxoid and tetanus Ig

Question 12

appropriate management for a soiled/thru-dermis animal bite in a rabies-immunized animal, and human with tetanus booster vaccination history of less than 5 years ago

Answer 12

tetanus toxoid only

Question 13

eosinophilic infiltrate in the dermal-epidermal junction. positive for C3 or IgG in basement membrane in pregnant woman.

Answer 13

pemphigus gestationis

Question 14

location of antibody deposition in salt split technique in blisters of bullous pemphigoid v. pemphigus gestationis

Answer 14

BP = roof
PG = floor

Question 15

organism that causes common wart

Answer 15

HPV

Question 16

greasy, well circumscribed, sun area of skin
dx?
tx?

Answer 16

seborrheic keratosis; reassurance

Question 17

newborn with flat, salmon-pink blanching, symmetric skin patch between eyebrowns or neck

Answer 17

nevus simplex

Question 18

B9 skin lesion in groups of 1-2mm. MC ankles, feet, hands, fingers, extensor surfaces of extremities. center can be hyperpigmented or absent. healthy children and YA. no sx. KOH scrapings reveal no fungi. no scaling.

Answer 18

granuloma annulare

Question 19

best sampling technique for non-melanoma (BCCa or SCCa) non-pigmented, raised skin lesions

Answer 19

shave biopsy

Question 20

best sampling technique for melanoma

Answer 20

excisional biospy

Question 21

best tx for confirmed BCCa

Answer 21

cryosurgery