Derm Flashcards
Tinea pedis Ix
Skin scrape
Herpes simplex Ix
Viral swab
Impetigo Ix
Bacterial swab
Hyperkeratosis and Munro abscesses?
psoriasis
in Porphyria cunea tarda what is there a build up of
uropophinogen
What could be the cause for a child crying when in direct sunlight
Erythropoietic Protoporphyria.
1st line treatment for Acne rosacea
topical metronidazole
1st line treatment for acne vulgaris
Benzoyl Peroxide [can add topical clindamycin]
What is epidermolysis bullosa
breakdown of anchoring between epidermis and dermis
what is erythema multiform associated with
mycoplasma pneumonia
HSV
treatment for Dermatitis herpetiformis and what is it associated with
Oral dapasone
gluten free diet
coeliac disease
acne rosacea tx and what is it associated with
mild = topical metronidazole [plus azeliac acid]
mod = PO tetracycline or erythromycin
blepharitis
skin biopsy of pemphigus vulgaris
IgG crazy paving/chicken wire pattern in epidermis
skin biopsy of bullous pemphigoid
linear IgG deposits across basement membrane
which has mucosal involvement and which does not - from pemphigus and pemphigoid
Pemphigus = mucosal involvement
Pemphigoid = no mucosal involvement
bacteria that causes lyme disease and 1st stage skin condition seen
borrelia burgdorferi
erythema migrans “bulls-eye rash”
cellulitis treatment
mild = flucloxacillin 1g qds for 7 days
if pen allergic = doxy PO 100mg BD for 7 days
severe = IV flux 1g QDS
if pen allergic = IV Vancomycin (step down to PO Doxy)
what is the most common cause of fungal nail infections
trichophyton rubrum
most common cause and tx of necrotising fasciitis
cause = grp A strep [pyogenes]
Flux 2g IV + Clindamycin 1.2 IV + Gent 7mg/kg
and surgical debridement
If pen allergic = just Clindamycin and Gentamicin
preferred Tx for actinic keratosis
5-FU
[if mild = can use topical diclofenac]
what is the other name for seborrhoeic keratosis
basel cell papilloma
what type of melanoma is described as “red/black lump, bleeds easily, see on sun exposed skin”
nodular melanoma
- aggressive, invade early
woman with brown patch all her life
lentigo mealigna
pityriasis versicolour features
hypopigmented, pink or brown (hence versicolor).
May be more noticeable following a suntan
pityriasis versicolour Tx
1st line = topical ketoconazole
where might pyoderma gangrenosum affect and what is Tx
stoma site
1st line = PO steroids
2nd line = Infliximab
what drug can exacerbate plaque psoriasis
beta blockers
list steroid creams from mild to potent
mild = hydrocortisone
moderate = clobetasone
potent = betamethasone
v potent = dermovate
different skin types
I: Never tans, always burns II: Usually tans, always burns III: Always tans, sometimes burns IV: Always tans, rarely burns V: brown skin, e.g. Indian VI: Black skin
what rash may appear in a fir-tree pattern
Pityriasis rosea
[get herald patch, followed by rest of rash = self-limiting]
psoriasis Tx
1st line = topical steroid and topical Vit D analogue once daily
2nd line = up vitamin D analogue to twice daily
3rd line = up steroid to twice daily
4th line = immunosuppression
what is eczema herpeticum
primary infection of eczema by herpes simplex virus 1 or 2
get monomorphic punched out lesions
Tx for eczema herperticum
admit and give IV acyclovir
