dermatology Flashcards
head lice management
Wet-combing and malathion 0.5% scalp application. 4x over 2 weeks
how much emollient /w if widespread dermatitis
500g.
apply 2-4x a day
mx tinea capitis
oral terbifanine/itraconazole
risk factors for melasma
genetics, ultraviolet exposure, oral contraception, pregnancy, and some medications such as anti-epileptics.
topical Steroid potency
Mild: Hydrocortisone 0.1-2.5%
Mild + Abx: daktakort, fucidin H, timodine, CanestenHC
Moderate: Betnovate RD
Eumovate (clobetasone butyrate)
Moderate +abx: Trimovate
Potent: Beclometasone dipriopionate 0.025%, betamethasone valerate 0.1%, Hydrocortiosne butyrate, mometasone furoate 0.1%
V potent: dermovate
SCC risk factors
Sun, chemicals: coal tar, chronic irritation, immunosupression.
Non pigmented skin.
HSP
Small vessel immune complex vasculitis.
1/3 -> preceding Group A strep infection.
Rash- all - symmetrical red patches within which areas of haemorrhage and palpable purpura particularly affecting extensors - knees, elbows, buttocks. 2-3 months of rash before subsiding.
Joint involvment - 75%arthritis/arthralgia.
GI sx 65%- diffuse pain +/- GI bleeding
Kidney disease- haematuria, proteinuria, impaired renal fn.
Mx: admit as same day emergency if renal issues or rapid access outpatient paediatric review depending on clinical condition.
HHT
Spontaneous recurrent nosebleeds
Multiple telangiectasia on skin and mucous membranes
Involvment of internal organs
Affected parent, sibling or child
Mx: specialist referral
rapid growing several months, pigmented, benign.
Spitz naevus
need to refer incase melanoma
Actinic keratosis treatment
Watch and wait, 25% resolve spontaneously.
cryotherapy,
Diclofenac 3% gel,
5FU cream, 5% imiquimod cream,
Ingenol mebutate gel.
Sun protection.
Recent growth, pain, bleeding , ulceration -> transfomration into SCC -> derm referral
Facial rash, worsening 3monhts,
Forehead, cheeks, nose, 60yo, worse with sunlight, warm, eating spicy foods.
erythema with Papules, pustules
Rosacea
Treatment: avoid lifestyle triggers.
Topical metronidazole gel/azeleic acid. Then oral tetracycline/erythromycine.
treatment for plaque psoriasis
Offer potent steroid OD + vit D or vit D analogue (calcipotriol and betametasone) separately. for 4 weeks
Acne mx 1st line topical
12 weeks of
Topical adapalene 0.1% + topical benzoyl peroxide 2.5% fixed combo
Topical tretonoin 0.025% + topical clindamycin 1%
Topical benzoyl peroxide + topical clindamycin
Painful lump on ear pinna present for 5months, exquisitely tender, old man, may ulcerate.
Chondrodermatitis nodularis
Tx: can persist sevel months/years
Conservative mx: dont sleep on that side, warm hat over ears in cold. Intralesional steroid injections, cryotherapy or surgery
