dermatology amk 21/05/2022

Question 1

elderly man who enjoys gardening and presents with a non healing bleeding ulcer on his ear

Answer 1

SCC

Question 2

can melanoma form under the nail

Answer 2

yes
over 3mm
cover the whole nail across from bored to border
and involves the nail bed

Question 3

most common cause of cellulitis

Answer 3

strep pyrogens

Question 4

acne vulgaris infection of pilosbacious gland

what increases production on androgens from the seboneam glands

Answer 4

puberty

tx is topical benzoyl peroxide

topical retinoids chemical related to vitamin a slow the production of zebu
topical abx

last line option is oral retinoids - highly teratogenic - depression anxiety and aggression dn suicidal ideation

Question 5

thick erythemaorus plaques with silver scales, commonly seen on the extensor surfaces

Answer 5

plaque psoriasis

gutter in children - papule by strep throat

pustules - sysmetically unwell
erythrodermic psoriasis - skin exfoliates leaving raw exposed areas

these two need medical emergency

Question 6

target lesions - mycoplasma

Answer 6

erythema multiforme

Question 7

molluscum contagiosum

Answer 7

spread through towels or bed sheets , characteristic central dimple

Question 8

ringworm - tine - trichophyton - different names depending on what part of the body it affects

presents as what

Answer 8

erythematous, scaly, well demarcated rsh with degrees

antifungal cream - clotrimazole
for the scalp - anti fungal shampoo - ketoconazole
flucanzolje for body

Question 9

already existing skin codntios

Answer 9

koebner phenomenon - present similarly to a keloid scar