Answers
A 33-year-old Caucasian man presents with redness, itching, and burning on the back
of his hands. He gives a history of clearing "weeds" on his farm yesterday. You ask him
to describe the weeds, and he states that they had a cluster of three leaves. There are
several tiny blisters with a linear distribution on both of his hands.
Question
What is the most likely diagnosis?
Answer Choices
1. Poison ivy dermatitis
2. Insect bite
3. Sunburn
4. Nickel allergy from his tools
5. Poison sumac dermatitis - Correct Answer 1. Poison Ivy Dermatitis
A 16-year-old boy presents with a general itching of his hands and wrists. It started a
few weeks after he went to play in a high school soccer tournament. On physical exam,
you note several wavy skin-colored ridges on his hands and wrists with excoriations.
There are multiple small erythematous papules on flexor surface of wrists. You note that
the intertriginous areas of the hands are involved.
Question
What is the most likely diagnosis?
Answer Choices
1 Ringworm
2 Tine corpora’s
3 Spider bite
4 Body lice
5 Scabies - Correct Answer 5. Scabies
A 16-year-old girl has moderate facial acne vulgaris that you plan to treat with retinoid-
containing creams. What potential condition should you rule out before treating the
patient with retinoic acid cream?
Answer Choices
1 Graves' disease
2 Pregnancy
3 Psoriasis
4 Contact dermatitis
5 Dermatitis caused by poison ivy - Correct Answer 2. Pregnancy
A mother brings her 5-year-old boy to the pediatrician due to multiple blisters on his
cheek and nose. Physical examination is remarkable for numerous vesicles and crusted
, lesions containing light yellow fluid on both cheeks and around the nose. The child has
similar lesions on his right wrist.
Question
What treatment is most appropriate?
Answer Choices
1 Bacitracin ointment
2 Oral dicloxacillin
3 Oral penicillin
4 Oral tetracycline
5 Mupirocin ointment - Correct Answer 2. Oral dicloxacillin
A 33-year-old woman presents to the office with multiple vesicles with associated
intense itching on her hands and feet. Her past medical history is negative. The patient
is a waitress who takes no medication and does not work with chemicals. The vesicles
are tense with some scales. There is no erythema or initial incidence of itching. The
vesicles have responded well to a limited treatment with a high steroid cream.
Question
What is this patient's most likely diagnosis?
Answer Choices
1 Dyshidrotic eczema
2 Tine pedis
3 Contact dermatitis
4 Bullous pemphigoid
5 Bullous diabetic rum - Correct Answer 1. Dyshidrotic eczema
A 3-year-old girl presents with a 2-week history of a pruritic erythematous excoriated
rash. Her past medical history is unremarkable. Her only medications include a topical
steroid ointment and oral diphenhydramine. She has no known allergies. She lives on a
farm on the outskirts of her town. She does not attend daycare and lives with three older
siblings and her parents. There are cats and dogs in the house, which appear to be in
good health. Her physical exam is significant for small red papules in her interdigital
spaces, wrist flexors, anterior axillary folds, and forearms. Scattered red-brown nodules
are found in her axillary region.
Question
What diagnostic study would confirm the diagnosis?
Answer Choices
1 Wood lamp examination
2 Skin biopsy
3 Culture of epidermal scrapings
4 Microscopic examination of skin scrapings
5 Potassium hydroxide prep of skin scrapings - Correct Answer 4. Microscopic
examination of skin scrapings
A 5-day-old female newborn was born 5 weeks prematurely and presents to her first
pediatrician's appointment. She did not have any feeding or breathing issues, so mother
and child had only a 2-day stay at the hospital. During the cardiovascular examination,