General Flashcards
7 cards from real Dermatologist Certificate practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 General flashcards as text
What is the Breslow thickness threshold above which sentinel lymph node biopsy is routinely recommended for melanoma?
Answer: 1.0 mm
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.
A patient presents with diffuse hair shedding 3 months after a major surgery. What type of alopecia is this?
Answer: Telogen effluvium
Telogen effluvium occurs 2–4 months after a physiological stressor (surgery, illness, childbirth), causing premature shift of hair follicles into the telogen phase.
Which condition is characterized by thickened, yellow-green nails with slow growth and is associated with lymphedema and pleural effusion?
Answer: Yellow nail syndrome
Yellow nail syndrome is a rare disorder characterized by yellow, thickened, slow-growing nails associated with lymphedema and respiratory manifestations.
Photosensitivity caused by tetracyclines is primarily classified as which type of reaction?
Answer: Phototoxic
Tetracyclines cause phototoxic reactions that are dose-dependent and do not require prior sensitization, occurring in most exposed individuals.
Which type of hypersensitivity reaction is responsible for allergic contact dermatitis?
Answer: Type IV (cell-mediated)
Allergic contact dermatitis is a Type IV delayed hypersensitivity reaction mediated by sensitized T lymphocytes, typically occurring 48–72 hours after exposure.
A neonate develops a widespread vesiculopustular eruption within the first 2 weeks of life. Tzanck smear shows multinucleated giant cells. What is the diagnosis?
Answer: Neonatal herpes simplex
Neonatal HSV presents with vesiculopustular eruption in the first weeks of life; Tzanck smear showing multinucleated giant cells confirms herpetic etiology.
Which SPF value indicates protection against approximately 97% of UVB radiation?
Answer: SPF 30
SPF 30 blocks approximately 97% of UVB rays, SPF 50 blocks ~98%, and SPF 100 blocks ~99% — the incremental difference above SPF 30 is minimal.
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