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STEP2 Dermatology

Dermatology UWORLD

QuestionAnswer
A malignant melanoma may occur wherever there are --> Pigmented cells
What are the findings that suggest malignant melanoma? 1. ASYMMETRIC shape 2. Irregular border 3. Color variability 4. Diameter ≥ 6mm 5. Evolution in size and appearance over time.
How is tinea corporis described clinically? Superficial fungal infection characterized by pruritic, scaly, erythematous plaques with a raised border and central clearing
How is tinea corporis diagnosed confirmed? Potassium hydroxide examination of skin scrapings
What are the 1st-line of treatment for tinea corporis? Topical clotrimazole and/or terbinafine
How is urticaria often described? Well-circumscribed erythematous plaques w/ intense pruritus and edema.
What sign or specific characteristic are associated with urticaria rashes? Wheals
Which type of skin cancer is associated with a non-healing ulcer arising from a scar or chronic wound? Squamous Cell Carcinoma of the skin
Congenital melanocytic nevus is associated with: ↑↑↑ density of hair follicles
What 3 common factors predisposing to Basal cell carcinoma of the skin? 1. Sun/UV light (B>A) 2. Fair skin (white) 3. Ionizing radiation
What are common clinical features of basal cell carcinoma of the skin? 1. Skin colored, pearly papule ± rolled borders 2. Telangiectatic vessels 3. ± central ulceration, local invasion
What is the management of BCC of the skin? 1st line: 1. Surgical excision with 4-mm margins 2. Mohs micrographic surgery 2nd line: - topical 5-FU, imiquimod, curettage and electrodessication
Child abuse: deliberate scald injuries: - Sharp lines of demarcation - Uniform depth - Lack of splash marks - Spared flexural creases
What are the names given to spare flexural creases burns in scaled injuries? "Zebra" pattern and "doughnut" pattern (butt is spared).
Created by: rakomi
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