Dermatology Flashcards
(13 cards)
When are tetracyclines contraindicated?
Tetracyclines are contraindicated during pregnancyor breastfeeding.
What is Bowen’s disease?
Squamous carcinoma in situ
1st line treatment for chronic plaque psoriasis?
Topical potent corticosteroid + vitamin D analogue is first-line for chronic plaque psoriasis
1st line tx for scalp psoriasis
Topical potent corticosteroids
Rosacea tx for a patient with severe papules and pustules?
Topical ivermectin + oral doxycycline is first-line for patients with severe papules and/or pustules.
Koebner phenomenon
The Koebner phenomenon describes skin lesions that appear at the site of injury. It is seen in:
- psoriasis
- vitiligo
- warts
- lichen planus
- lichen sclerosus
- molluscum contagiosum
Causes of erythema NODOSUM?
NO - idiopathic
D - drugs (penicillins, sulphonamides)
O - OCP / pregnancy
S - sarcoid / TB
U - UC / Crohn’s
M - microbiology (strep, mycoplasma, EBV)
First-line treatment for a flare of plaque psoriasis affecting extensors is what?
Potent topical corticosteroid + Topical vitamin D preparation.
(Both applied once a day, but at different times of day).
Explain the steroid cycles when treating psoriasis.
Give steroids for no more than 8 weeks at a time with a minimum of a 4 week break in between (with a topical Vit D analogue).
Rosacea - Mild-to-moderate papules and/or pustules - what’s 1st line?
Topical ivermectinis first-line
What is koebner phenomenon?
The Koebner phenomenon describes skin lesions that appear at the site of injury. It is seen in:
psoriasis
vitiligo
warts
lichen planus
lichen sclerosus
molluscum contagiosum
Anti-jo 1 antibodies
Dermatomyositis
Dermatomyositis skin manifestations
photosensitive
macular rash over back and shoulder
heliotrope rash in the periorbital region
Gottron’s papules - roughened red papules over extensor surfaces of fingers
‘mechanic’s hands’: extremely dry and scaly hands with linear ‘cracks’ on the palmar and lateral aspects of the fingers
nail fold capillary dilatation
