Board Basics Derm I

Question 1

Guttate psoriasis is associated with what infetion?

Answer 1

B-hemolytic strep (many small drop-like papules and plaques on the trunk)

Question 2

What medicine can pusutular psoriasis be triggered by?

Answer 2

glucocorticoids

Question 3

Does classic plaque psoriasis present on the extensor or flexor surfaces of joints?

Answer 3

extensor

Question 4

Never use ____ to treat psoriasis

Answer 4

steroids

Question 5

What is the difference between candida intertrigo and tinea cruris?

Answer 5

tinea cruris does not involve scrotum

Question 6

A patient presents for thick, yellow, crumbling toenails. What do you do before starting antifungal treatment?

Answer 6

KOH scraping/culture for dermatophytes

Question 7

How long can itching from scabies last?

Answer 7

2 weeks, do not retreat during this time (esp avoid topical lindane because of neurotoxicity)

Question 8

Rapid onset of multiple pruritic seborrheic keratoses can be a sign of _____.

Answer 8

GI adenocarcinoma

Question 9

Acute severe seborrheic dermatitis can indicate ____.

Answer 9

HIV

Question 10

What do you use for typical warts and what do you use for anogenital warts?

Answer 10

salicylic acid; podophyllin

Question 11

Actinic keratosis is a precursor to which cancer?

Answer 11

SCC (squamous cell carcinoma)

Question 12

How do you treat actinic keratosis?

Answer 12

Single lesion: liquid nitrogen/excision

Many: topical 5-FU or imiquimod cream

Question 13

IgE mediated cephalosporin reaction occurs in ___% of patients who are allergic to PCN.

Answer 13

2%

Question 14

What is the Jarish0Herxheimer reaction?

Answer 14

Characterized by fever, HA, myalgia, rash and hypotension after treatment for Lyme/syphilis from dying spirochetes releasing endotoxin; lasts 2 hours-48 hours after treatment. Do NOT stop treatment; just support patient.