Answer and Explanation 5

5.   D is the correct answer.  This is shingles.  This is characteristic grouped vesicles on a erythematous base in a dermatomal distribution.  Contact dermatitis can have  blister appearance but does not follow a dermatomal distribution.  MRSA typically has a more erythematous appearance and does not follow a dermatomal distribution.  It may have a central necrotic center.  Cellulitis too does not follow a dermatomal distribution and has more of a reddened and warm appearance.

Question 5

5.   Which of the following diagnoses best fit the picture listed below?

A.  MRSA

B.  Cellulitis

C.  Contact Dermatitis

D.  Shingles

Answer and Explanation 4

4.  A is the correct answer.  This rash is a malar.  It has the characteristic butterfly appearance with the nasolabial fold sparing.  Roscea and Fifth's  disease just affects the cheeks and usually has a deeper red appearance.  Photosensitivity does not affect the face in this way just in that area.  This patient needs a further workup for SLE.

Question 4

4.  What is the diagnosis of the rash listed below?

A.  Malar rash

B.  Rosacea

C.  Fifth's Disease

D.  Photosensitivity

Answer and Explanation 3

3.  B is the correct answer.  It is often difficult to differentiate between tinea corporis and erythrasma   They both are well demarcated.  Erythrasma usually has a darker brown appearance and is thicker.  This is important because it erythrasma is caused by corynebacterium and tinea is fungal.  It usually responds to erythromycin.  This is not Vitiligo.

Question 3

3.   Which of the following best describes the lesion listed below?

A.  Tinea Corporis

B.  Erythrasma

C.  Substantia Nigricans

D.  Vitiligo

Answer and Explanation 2

2. C is the correct answer.  Kerion is a scalp lesion that develops with tinea capitus that is an inflamed secondarily infected lesion.  It has a boggy granulated appearance.  It is best treated with oral anti fungals, and oral antibiotics may be needed.  Pemphigus is a bullous lesion that usually affects the torso the most.  This is not a cutaneous abscess. This is not shingles because there is no vesicular appearance and it does not follow a dermatomal distribution.