ABD Pediatric Dermatology 2

Question 1

A newborn presents with a solitary, firm, flesh-colored nodule that dimples when compressed laterally (Fitzpatrick sign). What is the most likely diagnosis?

Accepted Answer

Juvenile xanthogranuloma

Answer

Juvenile xanthogranuloma is a benign yellow-orange papulonodule of infancy, though the dimple sign classically describes dermatofibroma in older patients.

Question 2

A 6-year-old develops a solitary tan macule with a 'coast of Maine' irregular border. This finding is most associated with which condition?

Accepted Answer

McCune-Albright syndrome

Answer

Large café-au-lait macules with irregular 'coast of Maine' borders are characteristic of McCune-Albright syndrome.

Question 3

An infant presents with a rapidly enlarging strawberry-red plaque on the face. Which complication warrants urgent systemic beta-blocker therapy?

Accepted Answer

Periocular location threatening the visual axis

Answer

Periocular infantile hemangiomas obstructing the visual axis risk amblyopia and require prompt propranolol treatment.

Question 4

A child with atopic dermatitis develops punched-out monomorphic vesicles and erosions over the eczematous areas with fever. What is the diagnosis?

Accepted Answer

Eczema herpeticum

Answer

Eczema herpeticum is a disseminated HSV infection over eczematous skin requiring systemic acyclovir.

Question 5

A neonate has a linear array of vesicles along Blaschko's lines followed by verrucous streaks. This first-stage finding suggests which X-linked disorder?

Accepted Answer

Incontinentia pigmenti

Answer

Incontinentia pigmenti presents with vesicular, verrucous, hyperpigmented, and atrophic stages along Blaschko's lines in females.

American Board of Dermatology (ABD) Practice Test

American Board of Dermatology (ABD) Practice Test

ABD Pediatric Dermatology 2