October Week 3

Exanthem

Prep questions:

2008, #33:
A 4 yo boy presents with a 3 month history of a recurring pruritic eruption on the abdomen. The parents report that each outbreak lasts 1-2 weeks. No one else in the home is similarly affected. Physical exam reveals clustered erythematous papules measuring 4-6 mm in diameter (see picture). A few papules have a central punctum. Of the following, the MOST likely diagnosis is:
A. Folliculitis
B. Gianotti-Crosti disease
C. Molluscum contagiosum
D. Papular urticaria
E. scabies

2008, #65
You are asked to evaluate a healthy 9 yo boy who has a rash of several weeks’ duration. Physical exam reveals several erythematous plaques on the trunk surmounted by a thick, adherent scale. You observe pinpoint areas of hemorrhage on the surfaces of some lesions. Of the following, the MOST likely diagnosis is:
A. nummular eczema
B. pityriasis rosea
C. psoriasis
D. seborrheic dermatitis
E. tinea corporis

2008, #81
An 8 yo boy presents with a 2 week history of an enlarging, tender lump on the scalp. The only notable findgins on physical exam are alopecia overlying a boggy mass on the scalp and posterior cerivacal lymphadenopathy Of the following, the MOST appropriate therapy is:
A. cefazolin IV
B. griseofulvin po
C. incision and drainage
D. ketoconazole topically
E. mupirocin topically

2008, #81
An 8 yo boy presents with a 2 week history of an enlarging, tender lump on the scalp. The only notable findgins on physical exam are alopecia overlying a boggy mass on the scalp and posterior cerivacal lymphadenopathy Of the following, the MOST appropriate therapy is:
A. cefazolin IV
B. griseofulvin po
C. incision and drainage
D. ketoconazole topically
E. mupirocin topically

2008, #1

A 10 yo girl has had a rash for 4 days without other symptoms. She is taking no medications. Physical exam reveals erythematous cheeks and a lacy reticulated erythema involving the extremities. Of the following the MOST likely diagnosis is:
A. erythema infectiosum
B. phototoxic reaction
C. polymorphous light eruption
D. scarlet fever
E. SLE

2008, #84
A worried mother brings her 18 month son to the emergency department because of a rash that developed today. She reports that he has had a runny nose and temp to 104F for the last 3 days, but the fever resolved yesterday. His immunizations are up to date. On physical exam, he appears well, is afebrile, and has diffuse 2-3 mm erythematous macules and papules over his trunk. Of the following, the MOST likely cause of the rash is:
A. Adenovirus
B. Coxsackie virus
C. Epstein barr virus
D. HHV6
E. Parvovirus B19