Dermatologist Certificate Skin Disorders and Diagnosis 2

Question 1

What is the most common cause of tinea capitis in the United States?

Accepted Answer

Trichophyton tonsurans

Answer

Trichophyton tonsurans is responsible for the majority of tinea capitis cases in the US, particularly in school-aged children of African American descent.

Question 2

Dermatitis herpetiformis is strongly associated with which systemic condition?

Accepted Answer

Celiac disease (gluten-sensitive enteropathy)

Answer

Dermatitis herpetiformis is the cutaneous manifestation of celiac disease, with IgA deposits in dermal papillae triggered by gluten sensitivity.

Question 3

Which feature best distinguishes seborrheic keratosis from a melanoma?

Accepted Answer

Stuck-on appearance with horn cysts visible on dermoscopy

Answer

Seborrheic keratosis has a characteristic 'stuck-on' waxy appearance with comedone-like openings (horn cysts) seen on dermoscopy, distinguishing it from melanoma.

Question 4

What is the ABCDE rule used to evaluate in dermatology?

Accepted Answer

Asymmetry, Border irregularity, Color variation, Diameter >6mm, Evolution

Answer

The ABCDE criteria — Asymmetry, Border irregularity, Color variation, Diameter greater than 6mm, and Evolution — are used to assess pigmented lesions for potential melanoma.

Question 5

Which condition presents with comedones, papules, pustules, and nodules primarily on the face, chest, and back?

Accepted Answer

Acne vulgaris

Answer

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.

Dermatologist Certificate Practice Test

Dermatologist Certificate Practice Test

Dermatologist Certificate Skin Disorders and Diagnosis 2