Complete Quiz Review
(Questions & Solutions)
2025
1
, 1. MCQ
A 29-year-old surfer notices a dark lesion on his shoulder. Which single
criterion from the ABCDE mnemonic alone most strongly predicts
malignant melanoma?
A. Symmetrical shape
B. Border regularity
C. Color uniformity
D. Diameter > 6 mm
ANS: D
Rationale: A diameter larger than 6 mm is a well-validated red flag for
melanoma.
---
2. T/F
The epidermis of healthy adults is completely replaced approximately
every four weeks.
ANS: True
Rationale: Keratinocytes migrate from the basal layer to the stratum
corneum and desquamate in a ~28-day cycle.
---
3. FITB
Capillary refill is considered brisk if color returns to the nail bed in ≤ ___
seconds.
ANS: 2
Rationale: A refill time ≤ 2 s reflects adequate peripheral perfusion.
---
2
, 4. MR (Select all)
Which factors elevate Mr. Wilson’s lifetime risk for cutaneous
melanoma?
[ ] A. Red hair and freckling
[ ] B. Five blistering sunburns before age 20
[ ] C. Daily broad-spectrum SPF 50 use
[ ] D. First-degree relative with melanoma
[ ] E. Fitzpatrick skin type VI
ANSs: A, B, D
Rationale: Phenotypic susceptibility, intense intermittent UV exposure,
and family history heighten risk; consistent sunscreen use and very dark
skin confer protection.
---
5. MCQ
On palpation, a single cervical lymph node is hard, 1.8 cm, fixed to
surrounding tissue, and non-tender. This profile is most consistent with:
A. Acute viral infection
B. Bacterial lymphadenitis
C. Metastatic malignancy
D. Autoimmune thyroiditis
ANS: C
Rationale: Hard, immobile, non-tender nodes suggest neoplastic
infiltration.
---
6. T/F
Apocrine sweat glands empty directly onto the skin surface.
ANS: False
3