shin lesions

Question 1

differential diagnosis of shin lesions includes ?

Answer 1

erythema nodosum
pyoderma gangrenosum
preitibial myxoedema
necrobiosis lipoidica diabeticorum

Question 2

clinical features of erythema nodosum

Answer 2

symmetrical,
erythematous,
tender,
nodules
which heal without scarring

Question 3

common cause of erythema nodosum ?

Answer 3

strep infections
tuberculosis

sarcoidosis
inflammatory bowel diseases
Behcet’s

and drugs
penicillins / sulphonamides
combined oral contraceptive pill

pregnancy

Question 4

clinical features of Pretibial myxoedema

Answer 4

symmetrical, erythematous lesions
shiny orange peel skin

Question 5

common cause of pretibial myxoedema ?

Answer 5

graves disease

Question 6

clinical feature of pyoderma gangrenosusm ?

Answer 6

Initially small red papule
later deep, red, necrotic ulcers with a violaceous border

Question 7

cause of pyoderma gangrenosusm ?

Answer 7

50 percent idiopathic
seen in IBD - ulcerative colitis and myeloproliferative disorders

Question 8

clinical features of Necrobiosis lipoidica diabeticorum

Answer 8

shiny, painless areas of yellow/red skin typically on the shin of diabetics
often associated with telangiectasia