all derm Flashcards
treatment staphylococcal scalded skin
IV fluclox and topical fusidic acid
management acne vulgaris
first line - single topical therapy (retinoids, benzoyl peroxide)
second line - topical combination (retinoids, benzoyl peroxide, topical abx)
oral abx - tetracyclines (must be used in combination for < 3 months)
COCP as alternative to oral abx
severe - oral isotretinoin
what is eczema herpeticum
HSV infection of eczema
vesicular rash which ulcerates and crusts
treat with IV acyclovir
management BCC
surgical excision with 4mm margin
curettage and cautery
moh’s surgery
topical therapies -imiquimod or 5-fluorouracil
presentation tinea
round scaly lesion
itchy
central clearing (ring worm = ring shape)
capitus - scalp
corporis - trunk, legs or arms
pedis - feet
management tinea
skin - terbinafine or topical ketoconazole
scalp - griseofulvin or terbinafine
nails - terbinafine
causes erythema multiforme
infections - HSV, mycoplasma, CMV, VZV
drugs - sulphonamides, NSAIDs, allopurinol, penicillin, phenytoin
causes erythema nodosum
NO cause - idiopathic
Drugs - sulphonamides
OCP - oral contraceptive pill
Sarcoidosis
UC/Crohns
Micro - TB, strep
what causes pityriasis versicolour
fungus - Malassezia furfur
presentation pityriasis versicolour
- circular hypo/hyperpigmented patches
- fine white scale
- itchy
- back of neck and trunk
management pityriasis versicolour
topical antifungal e.g. ketoconazole shampoo
four types melanoma
most to least common
superficial spreading
nodular
lentigo maligna
acral lentiginous
what is guttate psoriasis
due to strep infection
tear drop papules on trunk and limbs
in children and adolescents
cause pityriasis rosea
HHV 6/7
pathophysiology bullous pemphigoid
autoimmune blistering disease due to auto-abs against hemidesmosomes
pathophysiology bullous pemphigus/pemphigus vulgaris
autoimmune blistering disease, auto-abs against desmosomes
which blistering disease involves mucosa
pemphigus vulgaris
management venous ulcers
compression banding
chronic psoriasis management
corticosteroid + vit D for up to 8 weeks
if no improvement - vit D analogue only BDS
if no improvement - steroid for 4 weeks again
wallace rule of 9s - burns
arm and head - 9% each
chest, back, each leg - 18%
parkland formula
volume of fluid (given in 24 hours) = body % burn x weight x 4
only include partial + full thickness burns
hartmanns
give 50% in first 8 hours
what burn percentage indicates fluid resus
> 15% in adults
10% in children
only second or third degree burns
who should be referred to specialist burns services
burns >2% in children, >3% in adults
deep partial or full-thickness
management actinic keratoses
fluoruracil cream
topical diclofenac
topical imiquimod
cyrotherapy
curettage and cautery
management actinic keratoses
fluoruracil cream
topical diclofenac
topical imiquimod
cyrotherapy
curettage and cautery
features lichen planus
purple
pruritic
polyglonal
papulues or plaques
white lacy lines on gums and tongue
flexor aspects of wrist and on ankle
exacerbating drugs psoriasis
beta blockers
lithium
antimalarials e.g. chloroquine
NSAIDs
ACEi
infliximab
management pyoderma gangrenosum
oral steroids
impetigo management
fusidic acid
don’t attend work/school until all lesions have crusted over or 48 hours after starting abx therapy
management scabies
permethrin
management rosacea
flushing - topical brimonidine gel
papules/pustules - topical ivermectin + oral doxycycline if severe
features SJS
systemic features
nikolsky sign
mucosal involvement
blistering
finger tip rule steroids
1 finger tip unit (FTU) = 0.5 g, sufficient to treat a skin area of 2 hands
management Bowen’s
5-fluorouracil
management shingles
oral acyclovir
infectious until the vesicles have crusted over, usually 5-7 days following onset
features different thickness burns
1st - Red and painful, dry, no blisters
2nd (superfic) - pink and painful, blistered
2nd (deep) - white, reduced sensation
3rd - leathery, no pain
immunosuppression risk factor for which skin condition
SCC
