Non-melanocytic Skin Tumours

Question 1

give an example of a benign epidermal tumour

Answer 1

seborrhoeic keratosis

Question 2

what epidermal tumours are precancerous dysplasia’s

Answer 2

Bowens disease, actinic keratosis and viral lesions

Question 3

what epidermal tumours are invasive malignancies

Answer 3

basal cell carcinoma(BCC) and squamous cell carcinoma(SCC)

Question 4

what type of skin is seborrhoeic keratosis common in

Answer 4

ageing/old skin

Question 5

describe what seborrhoeic keratosis is

Answer 5

benign proliferation of epidermal keratinocytes

Question 6

what are common sites for seborrhoeic keratosis

Answer 6

common on face and trunk

Question 7

describe the appearance and clinical features of seborrhoeic keratosis lesions

Answer 7

stuck on appearance with greasy hyperkeratotic surface

epidermal acanthosis, hyperkeratosis, horn cysts

Question 8

describe what the Leser-Trelat Sign is

Answer 8

eruptive appearance of many seborrhoeic keratosis lesions which may indicate internal malignancy

Question 9

what tumours are precursor lesions for squamous cell carcinoma(SCC)

Answer 9

Bowen’s Disease, Actinic keratosis, Viral lesions

all show squamous DYSLPASIA

Question 10

describe the appearance of Bowen’s disease

Answer 10

erythematous, scaly patch/plaque, irregular border, no dermal invasion

Question 11

what site and in what gender is Bowen’s disease most common

Answer 11

lower leg, females

Question 12

how common is actinic keratosis and what sites is it usually seen at

Answer 12

very common

sun exposed sites; scalp, face, hands

Question 13

what virus are viral lesions associated with

Answer 13

human papillomavirus(HPV)