Dermatology Quiz
Questions: 16 · 10 minutes
1. Which appearance is most typical of tinea corporis, commonly called ringworm of the body?
A smooth depigmented patch without scale
A diffuse flush with visible facial vessels
A cluster of deep nodules without surface change
An expanding annular patch with a scaly advancing edge
2. Which mole-related observation most warrants prompt professional assessment?
A pigmented lesion that is changing in shape, color, size, or symptoms
Several uniform freckles that darken evenly after sun exposure
A small, symmetrical mole that has looked the same for years
A stable, evenly colored birthmark documented since infancy
3. Which part of the epidermis provides the skin’s main barrier against water loss and many external irritants?
Stratum basale
Stratum corneum
Dermal papillary layer
Subcutaneous fat
4. A child develops superficial facial sores that rupture and leave golden, honey-colored crusts. Which condition is the classic match?
Herpes zoster
Non-bullous impetigo
Vitiligo
Pityriasis rosea
5. Which presentation is most characteristic of herpes zoster, or shingles?
Symmetrical scaling between all fingers without discomfort
A single painless brown patch present since childhood
Widespread wheals that move to new locations within hours
Painful grouped blisters in a one-sided dermatomal band
6. A person has sharply bordered red plaques with silvery scale on the elbows and knees. Which condition is the most characteristic match?
Vitiligo
Plaque psoriasis
Urticaria
Seborrheic keratosis
7. A small, flat area of altered skin color that cannot be felt above the surrounding surface is called what?
Papule
Macule
Vesicle
Nodule
8. Someone has a warm, tender red area on the lower leg. Which additional development most strongly indicates a need for urgent medical assessment?
The redness rapidly expands and fever or confusion develops
Mild dryness appears around the edge
The area remains small and unchanged for several days
The redness briefly lightens when the leg is raised
9. In the ABCDE guide for assessing pigmented lesions, what does the E represent?
Exfoliating
Elevated
Epidermal
Evolving
10. Several pinpoint red-purple spots remain visible when firm pressure is applied through a clear glass. How should this feature be described?
Blanching erythema
Post-inflammatory hyperpigmentation
Telangiectasia
Non-blanching petechiae
11. A child repeatedly develops very itchy, dry, inflamed patches in the bends of the elbows and knees. Which diagnosis best fits this pattern?
Tinea versicolor
Impetigo
Atopic dermatitis
Alopecia areata
12. Which finding most strongly supports acne vulgaris rather than rosacea?
Open and closed comedones
Persistent central facial flushing
Visible facial telangiectasia
Eye irritation accompanying facial redness
13. Several people in one household develop intense nighttime itching, especially around the finger webs and wrists. Which condition best fits?
Scabies
Keratosis pilaris
Melasma
Seborrheic dermatitis
14. Which general principle is most appropriate when a topical corticosteroid is being considered for facial skin?
Apply it continuously until every color change has disappeared
Choose the strongest available product because facial skin absorbs less medication
Use an appropriately low-potency product for a limited period under suitable clinical guidance
Assume all nonprescription steroid products are suitable around the eyelids
15. What does “broad-spectrum” mean on a sunscreen label?
It remains effective all day without reapplication
It physically blocks every wavelength of visible light
It provides protection against both UVA and UVB radiation
It prevents tanning while allowing sunburn
16. A rash appears where a nickel watchband contacts the wrist, usually hours to days after exposure. Which immune mechanism most commonly underlies this allergic contact dermatitis?
Immediate IgE-mediated hypersensitivity
Antibody-mediated destruction of skin cells
Delayed T-cell-mediated hypersensitivity
Immune-complex deposition