Benign skin lesions

Question 1

Ephelis

Answer 1

Freckles
Patchy increase in melanin skin pigmentation
Clumpy distribution of melanocytes
One copy of MC1R gene

Question 2

Actinic Lentigines - what is it, who gets it

solar lentigo

Answer 2

“age spots” “liver spots”
Patch of darkened skin, harmless
Common in sun exposed areas
Common in elderly people

Question 3

Actinic Lentigines (solar lentigo) - histology

Answer 3

Area of increased melanocyte proliferation

Epidermis has elongated rete ridges

Question 4

Seborrhoeic warts (basal cell papilloma)

Answer 4

Benign epidermal tumour
Common in ageing skin
Evolves slowly

Question 5

Seborrhoeic warts (basal cell papilloma) - morphology

Answer 5

Stuck on appearance 
Looks like a muffin
Greasy hyperkeratotic surface 
Well defined border 
Can be multicoloured

Question 6

Seborrhoeic warts (basal cell papilloma) - investigations

Answer 6

Excisional biopsy to check its not a melanoma

Question 7

Seborrhoeic warts (basal cell papilloma) - management

Answer 7

Cryotherapy

Curretage and cautery

Question 8

Dermatofibromas - morphology

Answer 8

Red, raised, round

Firm to treat

Question 9

Dermatofibromas - commonly affected areas

Answer 9

Lower legs