Skin Disorders and Diagnosis Flashcards
6 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 6 Skin Disorders and Diagnosis flashcards as text
What is the most common cause of tinea capitis in the United States?
Answer: Trichophyton tonsurans
Trichophyton tonsurans is responsible for the majority of tinea capitis cases in the US, particularly in school-aged children of African American descent.
Dermatitis herpetiformis is strongly associated with which systemic condition?
Answer: Celiac disease (gluten-sensitive enteropathy)
Dermatitis herpetiformis is the cutaneous manifestation of celiac disease, with IgA deposits in dermal papillae triggered by gluten sensitivity.
Which feature best distinguishes seborrheic keratosis from a melanoma?
Answer: Stuck-on appearance with horn cysts visible on dermoscopy
Seborrheic keratosis has a characteristic 'stuck-on' waxy appearance with comedone-like openings (horn cysts) seen on dermoscopy, distinguishing it from melanoma.
What is the ABCDE rule used to evaluate in dermatology?
Answer: Asymmetry, Border irregularity, Color variation, Diameter >6mm, Evolution
The ABCDE criteria — Asymmetry, Border irregularity, Color variation, Diameter greater than 6mm, and Evolution — are used to assess pigmented lesions for potential melanoma.
Which condition presents with comedones, papules, pustules, and nodules primarily on the face, chest, and back?
Answer: Acne vulgaris
Acne vulgaris involves follicular plugging (comedones) that progress to inflammatory papules, pustules, and nodules on sebaceous gland-rich areas of the face, chest, and back.
What wood lamp finding is characteristic of erythrasma?
Answer: Coral-red fluorescence
Erythrasma, caused by Corynebacterium minutissimum, produces coral-red fluorescence under Wood lamp due to porphyrins produced by the bacteria.
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