Dermatology Flashcards
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
