Laser Resurfacing Practice Questions

Question 1

Which of the following statements about burn management is correct?

Accepted Answer

Escharotomy is indicated for circumferential burns causing compartment syndrome

Answer

Cool (not ice-cold) water should be applied for 10-20 minutes to reduce tissue damage

Answer

All partial-thickness burns require sterile dressing to prevent infection

Answer

Silver sulfadiazine is contraindicated in patients with sulfa allergies

Question 2

Treatment of erythroplakia

Accepted Answer

Excision and regular follow up

Answer

Radiotherapy

Answer

Excision

Answer

Steroid injection

Question 3

Which of the following is a contraindication to topical steroids?

Accepted Answer

Dendritic ulcer

Answer

Herpetic stromal keratitis without epithelial defect

Answer

Elevated intraocular pressure

Answer

Non-infectious anterior uveitis

Question 4

YAG laser is used in the treatment of:

Accepted Answer

After cataract

Answer

Open-angle glaucoma

Answer

Retinal detachment

Answer

Diabetic retinopathy

Question 5

A lady with 50% TBSA burn with involvement of dermis and subcutaneous tissue came to the emergency department. The burns will be classified as:

Accepted Answer

3rd degree burn

Answer

2nd degree superficial

Answer

2nd degree deep

Answer

1st degree

Question 6

A child presents with grouped vesicles on an erythematous base on the buttocks. What is the most likely diagnosis?

Accepted Answer

Herpes simplex

Answer

Bullous impetigo

Answer

Dermatitis herpetiformis

Answer

Pemphigus

Question 7

The following findings on Tzanck smear can be seen in:

Accepted Answer

All of the above

Answer

Herpes simplex

Answer

Herpes zoster

Answer

Paraneoplastic pemphigus

Question 8

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 9

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 10

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

Laser Resurfacing — MCQs

Laser Resurfacing — MCQs

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