Infantile Rash – Friday Pop Quiz 6/18
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The dermatologist on call is requested to visit the NICU to evaluate an infant born 12 hours earlier with a disseminated rash. Two punch biopsies are performed and a c-KIT positive infiltrate is noted in the dermis of each sample. What is the most likely diagnosis?
A. T cell lymphoma
B. Mastocytosis
C. Syphilis, congenital
D. B cell lymphoma
E. Neuroblastoma
To find out the co …
The dermatologist on call is requested to visit the NICU to evaluate an infant born 12 hours earlier with a disseminated rash. Two punch biopsies are performed and a c-KIT positive infiltrate is noted in the dermis of each sample. What is the most likely diagnosis?
A. T cell lymphoma
B. Mastocytosis
C. Syphilis, congenital
D. B cell lymphoma
E. Neuroblastoma
To find out the co … 
This patient presented for a different lesion but you see this during your exam and perform a biopsy. If the pigmented lesion seen here is 0.9mm deep, what is the recommended margin for excision?
A. <0.5cm
B. 0.5cm
C. 1.0cm
D. 2.0cm
E. >2.0cm
To find out the correct answer and read the explanation, click here.
Brought to you by our brand partner Derm In-Review. A … 
This healthy 2-year-old female presents with a 2-day history of the pruritic rash seen here. She had mild edema of the dorsal hands and feet and positive dermatographism on exam. All lesions were transient, lasting less than 24 hours in the same location. She was otherwise well and her parents denied any fever or systemic symptoms. What is the best diagnosis?
A. Serum sickness-like reaction … 
A 6-month old infant develops tense blisters on the distal extremities which develop on normal-appearing skin. He has a neurologic disease and has been immobilized for a long period of time. The blisters spontaneously heal within 1-2 weeks. You suspect a diagnosis of coma bullae. Which of the following is the key characteristic histologic feature that would assist you in making this diagnosis? … 
A 65-year-old female patient presents with poorly demarcated, symmetric, very painful patches of erythema and retiform purpura, favoring the thighs and buttocks. Bullae and a dusky gray discoloration developed, as well as the appearance of ulcerations with black, leathery eschars. A skin biopsy of the affected area is suggestive of calciphylaxis. Shortly after, she dies from secondary infectio … 