Dermatologist Certificate Dermatological Procedures and Treatments 2

Question 1

What is the primary mechanism of action of botulinum toxin A in cosmetic dermatology?

Accepted Answer

Inhibits acetylcholine release at the neuromuscular junction causing temporary muscle paralysis

Answer

Stimulates collagen production in the dermis

Answer

Blocks substance P to reduce inflammation

Answer

Disrupts disulfide bonds in keratin filaments

Question 2

Which filler material provides the longest duration of effect among commonly used dermal fillers?

Accepted Answer

Poly-L-lactic acid (Sculptra)

Answer

Hyaluronic acid fillers

Answer

Calcium hydroxylapatite (Radiesse)

Answer

Collagen fillers

Question 3

What is the purpose of patch testing in dermatology?

Accepted Answer

To identify specific allergens causing allergic contact dermatitis

Answer

To diagnose irritant contact dermatitis

Answer

To detect immediate IgE-mediated hypersensitivity reactions

Answer

To confirm atopic dermatitis diagnosis

Question 4

Which electrosurgical technique uses alternating current to destroy tissue while controlling hemostasis?

Accepted Answer

Electrodesiccation and curettage (ED&C)

Answer

Radiofrequency ablation

Answer

Electrolysis

Answer

Iontophoresis

Question 5

What is the correct depth of injection for hyaluronic acid filler used to treat nasolabial folds?

Accepted Answer

Deep dermis to subcutaneous junction

Answer

Superficial epidermis

Answer

Subperiosteal plane

Answer

Muscle belly

Question 6

Sentinel lymph node biopsy is recommended for melanomas with Breslow thickness greater than which measurement?

Accepted Answer

0.8 mm (or 0.8–1.0 mm with high-risk features)

Answer

0.5 mm

Answer

2.0 mm

Answer

1.5 mm