Benign Conditions

Question 1

Age group affected by seborrhaic keratosis

Answer 1

> 30

Question 2

Features of seborrhaic keratosis (7)

Answer 2

Waxy/greasy
warty/papillomatous
well circumscribed
pale to dark brown
appear stuck on
benign
usually multiple
(keratin/cyst within)

Question 3

Management of seborrhaic keratosis

Answer 3

reassurance

can be removed via curettage, cryosurgery or shave biopsy

Question 4

Keratocanthoma features (4)

Answer 4

benign epithelial tumour
grows rapidly (SSC grows slower)
develops yellowish central crater filled with keratin
Keratin horn/hyperkeratotic core develops

Question 5

Prognosis and management of keratocanthoma

Answer 5

may regress after 3 months

REFER TO DERMATOLOGY-HARD TO DIFFERENTIATE FROM SCC

Question 6

Features of dermatofibromas (5)

Answer 6

benign
arise from sites of trauma e.g. insect bites
firm to touch
tethered
dimples when pressed

Question 7

Junction nevi features (2)

Answer 7

cluster of melanocytes
flat hyperpigmented areas of skin
ONLY IN EPIDERMIS

Question 8

Intradermal nevi features (3)

Answer 8

occur only in dermis
RAISED
melanocytes lose ability to produce pigment => skin coloured

Question 9

Compound naevi features

Answer 9

in both dermis and epidermis

Question 10

Congenital melanocytic nevus features

Answer 10

“birthmark”

benign

Question 11

Complications of congenital melanocytic nevus

Answer 11

increased risk of melanoma if >5cm

Question 12

Becker’s nevus features (3)

Answer 12

hamartoma
hard to treat
often becomes hairier over time

Question 13

Features of halo nevi

Answer 13

hyperpigmented centre surrounded by hypopigmented circle

benign

Question 14

Features of naevus spilus

Answer 14

speckled, lentiginous patch

Question 15

Spitz naevus

Answer 15

benign juvenile melanoma