Shin lesions

Question 1

Lesions which appear on the shins

Answer 1

erythema nodosum
pretibial myxoedema
pyoderma gangrenosum
necrobiosis lipoidica diabeticorum

Question 2

• Symmetrical, erythematous, tender, nodules
• heal without scarring
• caused by strep infection, systemic disease and drugs

Answer 2

Erythema nodosum

Question 3

• symmetrical, erythematous lesions
• often seen in Graves’ disease
• shiny, orange peel skin

Answer 3

Pretibial myxoedema

Question 4

• initial small red papule
• later deep, red, necrotic ulcers with a violaceous border
• mostly idiopathic in 50%, may also be seen in systemic disease (IBD, myleoproliferative, connective tissue disease)

Answer 4

Pyoderma gangrenosum

Question 5

• shiny, painless areas of yellow/red skin
• diabetics
• associated with telangiectasia

Answer 5

Necrobiosis lipoidica