Chemical Peels Practice Questions

Question 1

Benzoyl peroxide acts in acne vulgaris by:

Accepted Answer

Decreasing bacterial count

Answer

Reduces sebum production

Answer

Acts as a keratolytic agent

Answer

Increases epithelial turnover

Question 2

Acid that is decreased in acne comedones is?

Accepted Answer

Linoleic acid

Answer

Palmitic acid

Answer

Linolenic acid

Answer

Acetic acid

Question 3

Topical antiviral drugs are not indicated in:

Accepted Answer

Metaherpetic ulcer

Answer

Dendritic ulcer

Answer

Stromal necrotizing keratitis

Answer

All of the options

Question 4

A child presents with grouped vesicles on the lips. What is the bedside investigation that you would like to do?

Accepted Answer

Tzanck smear

Answer

Wood's lamp

Answer

Slit skin smear

Answer

KOH

Question 5

A cosmetic dermatologist plans to introduce microneedling radiofrequency for acne scars. Which parameter combination would provide optimal collagen remodeling with minimal risk of thermal injury in Fitzpatrick type IV skin?

Accepted Answer

Needle depth 1.5-2 mm, temperature 60-65°C, pulse duration 100-200 ms

Answer

Needle depth 3.5 mm, temperature 70°C, pulse duration 1000 ms

Answer

Needle depth 4 mm, temperature 75°C, pulse duration 500 ms

Answer

Needle depth 0.5 mm, temperature 55°C, pulse duration 50 ms

Question 6

A patient treated with Q-switched Nd:YAG laser for nevus of Ota develops paradoxical darkening after 4 weeks. What is the most likely explanation for this phenomenon?

Accepted Answer

Increased melanogenesis due to suboptimal fluence

Answer

Delayed clearance in deeper dermal melanocytes

Answer

Post-inflammatory hyperpigmentation due to epidermal injury

Answer

Conversion to melanoma

Question 7

A 42-year-old woman develops sudden onset vision loss in one eye 2 hours after hyaluronic acid filler injection in the glabella. Fundoscopy shows retinal whitening. What is the underlying pathophysiology?

Accepted Answer

Retrograde embolization via angular artery to ophthalmic artery

Answer

Compression of supraorbital nerve

Answer

Direct traumatic optic nerve injury

Answer

Allergic reaction causing optic neuritis

Question 8

A 28-year-old patient undergoes 70% glycolic acid peel for acne scars. Two hours post-procedure, he develops severe burning and erythema. What is the most appropriate immediate management?

Accepted Answer

Apply cold compresses and emollient

Answer

Apply topical steroid immediately

Answer

Start oral corticosteroids

Answer

Neutralize with sodium bicarbonate solution

Question 9

A 35-year-old woman desires correction of nasolabial folds. She has a history of herpes simplex labialis. Which dermal filler should be avoided?

Accepted Answer

Polymethylmethacrylate

Answer

Calcium hydroxylapatite

Answer

Hyaluronic acid

Answer

Poly-L-lactic acid

Question 10

What is the mechanism by which tretinoin improves photoaging?

Accepted Answer

Upregulation of collagen synthesis and inhibition of matrix metalloproteinases

Answer

Inhibition of tyrosinase enzyme

Answer

Direct antioxidant action on free radicals

Answer

Enhancement of melanin degradation

Chemical Peels — MCQs

Chemical Peels — MCQs

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