Dermatology - Benign + malignant tumours

Question 1

Answer 1

Solar keratoses

Question 2

Likelihood of solar keratoses developing to SCC?

Answer 2

Pretty much only slightly higher than normal skin!

Question 3

Answer 3

Solar keratoses

Do have dysplastic changes

Question 4

Answer 4

Solar keratoses which has been treated with field treatment (imiquimod/5-flurouracil) - unsightly + uncomfy for a few weeks

Question 5

Answer 5

Bowen’s disease

Question 6

Answer 6

Seborrheic keratosis

Question 7

‘Stuck on’ brown with granular/wart-like surface

Answer 7

Seborrheic keratoses

Question 8

Answer 8

BCC

Question 9

Answer 9

BCC

Question 10

Answer 10

BCC

Question 11

Answer 11

BCC

Question 12

Answer 12

Bleeding/ulcerated BCC

Question 13

Answer 13

BCC - large

Question 14

Answer 14

Lots of BCC

Question 15

How to treat flat BCC?

Answer 15

Field treatment (imiquimod or 5-fluorouracil cream)

OR photodynamic therapy

Question 16

Answer 16

Amelanotic melanoma

Very similar appearance to BCC and metastasis

Question 17

How to differentiate solar keratosis or Bowen’s

Answer 17

SK - small, ill-defined, sun exposed site
Bowens: >10mm, well circumscribed

Question 18

Answer 18

Pearly edge - BCC

Question 19

Answer 19

Smooth red plaque, some erosion in old man - BCC

Question 20

Answer 20

Chondrodermatitis

Benign

Question 21

Answer 21

Epidermoid cyst (cheesy filling). Benign.

Question 22

Answer 22

Dermatofibroma

FIRM feel, flat or slightly raised

Can look like a lot of things but firmness is key

Question 23

Answer 23

Raised mole. Same texture (not shiny or rough).

Question 24

Answer 24

Nodular BCC - skin coloured but shiny, translucent lesions

May have telangiectasia
Slow growing + do not metastasize

Question 25

Answer 25

SCC - dull rough surface not shiny + no telangiectasia

Question 26

Answer 26

Keratoacanthoma Skin coloured papula, central keratin plug which grows.

Question 27

Answer 27

Keratocanthoma Completely full of keratin plug

Question 28

What are lentigines?

Answer 28

Common benign brown spots 'sun spots'

Question 29

Answer 29

Dark lentigo on the lip

Question 30

Risk fx for melanoma

Answer 30

UV exposure Total number of moles Family hx of melanoma or other skin cancer Red hair/blue eyes

Question 31

Features of melanoma

Answer 31

Odd duckling mole Strange shape Multicoloured >3 colours Black Change, bleeding

Question 32

Answer 32

Melanoma

Question 33

Answer 33

Melanoma

Question 34

Diff dx for dark lesions

Answer 34

Naevi, BCC, Melanoma, dermatofibromas