Benign Skin Lesions

Question 1

What are features of Seborrhoeic Keratosis?

Answer 1

Benign warty lesions which develop as we age

Flat or raised lesions with stuck on appearance
Can appear in groups e.g. under breast/in groin/across back

Question 2

What is the management of seborrhoeic keratosis?

Answer 2

Reassurance
Can have biopsied/removed if needed

Question 3

What are features of solar lentigo?

Answer 3

Benign patch of pigmented skin which occurs due to sun exposure

Flat well circumscribed patch of hyperpigmentation

Often occurs on sun exposed sites

Question 4

What are features of keratocanthoma?

Answer 4

Rapidly growing locally destructive epithelial tumour

Initially smooth dome shaped nodule on sun exposed sites undergoes rapid growth

Characterised as a central hyperkeratotic plug

Surgically remove due to local invasion and cannot distinguish from SCC

Question 5

What are features of dermatofibroma?

Answer 5

Benign fibrous nodule
Often occurs post injury- e.g. gardners and thorn injuries

Solitary firm nodule
Pink/light brown in colour
Overlying skin dimples- button hole sign