December 1, 2015 - SG - Pruritis

Question 1

Dermatitis Herpetiformis

Answer 1

Blisters are not always seen because they can be scratched off.

Primary lesion is a vesicle.

Classic locations are extensor arms, knees, forehead, and buttocks.

Associated with Celiac disease.

Question 2

Sarcoptes scabiei

Answer 2

Scabies parasite

Causes burrows in the skin

Question 3

Scabies

Answer 3

Fine diffuse excoriated eruption.

The itch is a reaction to the mite.

Look for mites in around wrists and between fingers.

Question 4

Lichen Planus

Answer 4

Lacy white pattern on the buccal mucosa

Papules are the primary lesion

Purple polygonal papules appear on the skin that are “flat topped” or “lichenoid”.

Question 5

Atopic Dermatitis

Answer 5

Eczema

“The itch that rashes”

Extensor and facial involvement is common in infants

Chronic inflammation and localization to flexures increase in prevelance with age

Question 6

Uremic Pruritis

Answer 6

Caused by chronic kidney failure and high levels of urea in the blood.

Needs an urgent nephrology referral.