Dermatologist Certificate General 5

Question 1

What is the Breslow thickness threshold above which sentinel lymph node biopsy is routinely recommended for melanoma?

Accepted Answer

1.0 mm

Answer

SLNB is routinely recommended for melanomas >1.0 mm Breslow thickness; it may be considered for 0.8–1.0 mm lesions with high-risk features.

Question 2

A patient presents with diffuse hair shedding 3 months after a major surgery. What type of alopecia is this?

Accepted Answer

Telogen effluvium

Answer

Telogen effluvium occurs 2–4 months after a physiological stressor (surgery, illness, childbirth), causing premature shift of hair follicles into the telogen phase.

Question 3

Which condition is characterized by thickened, yellow-green nails with slow growth and is associated with lymphedema and pleural effusion?

Accepted Answer

Yellow nail syndrome

Answer

Yellow nail syndrome is a rare disorder characterized by yellow, thickened, slow-growing nails associated with lymphedema and respiratory manifestations.

Question 4

Photosensitivity caused by tetracyclines is primarily classified as which type of reaction?

Accepted Answer

Phototoxic

Answer

Tetracyclines cause phototoxic reactions that are dose-dependent and do not require prior sensitization, occurring in most exposed individuals.

Question 5

Which type of hypersensitivity reaction is responsible for allergic contact dermatitis?

Accepted Answer

Type IV (cell-mediated)

Answer

Allergic contact dermatitis is a Type IV delayed hypersensitivity reaction mediated by sensitized T lymphocytes, typically occurring 48–72 hours after exposure.

Dermatologist Certificate Practice Test

Dermatologist Certificate Practice Test

Dermatologist Certificate General 5