7) common benign skin lesions

Question 1

What are the important things to ask in the hx with common benign skin lesions?

Answer 1

Age: seb keratosis more common in elderly
nuber: more less likely to be nasty
symptoms? should it be removed
growth? rapid is always more worrying

Question 2

What are seb. keratoses? (aka basal cell papilloma)

Answer 2

very common epidermal proliferation. raised rough surface can range from mm to cm. most are asymptomatic but can itch. more common after 40. look stuck on

Question 3

What can multiple seb. karatoses be a sign of?

Answer 3

gastric malignancy (sign of leser trelat)

Question 4

What are the 3 main types of naevi?

Answer 4

junctional- proliferation at base of epidermis and flat

compound: epidermis and dermis, intermediate, junctional ones decrease with age and evolve to compound
intradermal: melanocytes entirely within the dermis. commonsest in adults. variable colour

Question 5

Rare types of naevi?

Answer 5

Blue- deep pigmentation

halo naevus- loss of pigmentation around the mole, usually seen in young adults

congenital- mole since birth, ofren become thicker and hairt, not really at increased risk