MD MD - Doctor of Medicine Dermatology and Skin Disorders Questions and Answers 1 — Questions and Answers
Question 1: What is the most common type of skin cancer in the United States?
- Melanoma
- Squamous cell carcinoma
- Basal cell carcinoma (Correct answer)
- Merkel cell carcinoma
Correct answer: Basal cell carcinoma
Basal cell carcinoma is the most common skin cancer in the US, accounting for approximately 80% of all skin cancers.
Question 2: Which dermatological condition is characterized by erythematous plaques with silvery scales?
- Eczema
- Psoriasis (Correct answer)
- Rosacea
- Vitiligo
Correct answer: Psoriasis
Psoriasis is characterized by well-demarcated erythematous plaques covered with silvery-white scales caused by accelerated keratinocyte turnover.
Question 3: Stevens-Johnson Syndrome (SJS) is most commonly triggered by:
- Viral infections
- Drug reactions (Correct answer)
- Autoimmune disease
- Bacterial toxins
Correct answer: Drug reactions
Stevens-Johnson Syndrome is most commonly triggered by drug reactions, particularly sulfonamides, anticonvulsants, and NSAIDs.
Question 4: The Nikolsky sign (skin separation with lateral pressure) is positive in which condition?
- Contact dermatitis
- Pemphigus vulgaris (Correct answer)
- Psoriasis
- Lichen planus
Correct answer: Pemphigus vulgaris
The Nikolsky sign is positive in pemphigus vulgaris due to loss of intraepidermal adhesion from autoantibodies against desmoglein.
Question 5: Which antibiotic is first-line treatment for uncomplicated cellulitis in a non-penicillin-allergic patient?
- Vancomycin
- Doxycycline
- Clindamycin
- Cephalexin (Correct answer)
Correct answer: Cephalexin
Cephalexin (a first-generation cephalosporin) is first-line oral therapy for uncomplicated cellulitis caused by streptococci and methicillin-susceptible staphylococci.
Question 6: The ABCDE criteria for melanoma screening stands for:
- Age, Bleeding, Color, Diameter, Evolution
- Asymmetry, Border, Color, Diameter, Evolution (Correct answer)
- Asymmetry, Blistering, Cells, Dermis, Elevation
- Area, Border, Circumference, Depth, Erythema
Correct answer: Asymmetry, Border, Color, Diameter, Evolution
ABCDE stands for Asymmetry, Border irregularity, Color variation, Diameter greater than 6 mm, and Evolution of the lesion.
MD MD - Doctor of Medicine Dermatology and Skin Disorders Questions and Answers 1
What is the most common type of skin cancer in the United States?