derm Flashcards
First line for severe rosacea?
Topical ivermectin + oral doxycycline
Rapidly growing, benign skin lesions that often appear as red papules and then develop into a crater filled with keratinous material?
Keratocanthoma
Well-circumscribed, waxy or greasy plaques with a ‘stuck-on’ appearance?
Seb keratosis
Which drug can exacerbate plaque psoriasis?
Beta blockers
Papular, polygonal, violaceous, flat-topped rash is present on the palms, in her elbow creases and on the soles of her feet? Rx?
Lichen planus - topical clobetasol
What demographic of patients have a higher susceptibility to keloid scarring?
Young black people
Renal transplant patients - commonest skin cancer?
Squamous cell cancer
First line for pyoderma gang?
Oral steroids
Hereditary haemorrhagic telangiectasia inheritance?
Autosomal dominant
Pityriasis versicolor rx?
Topical ketocanzole
Which virus plays a part in pityriasis rosea? Presentation of PR?
HH7 - herald patch and similar oval patches
On examination around 10 lesions are seen; they are raised, around 1-2mm in diameter and have an umbilicated appearance?
Molluscum
Causes of hypertrichosis?
Ciclosporin
Commonest site for keloid scars?
Sternum
Large, flat, symmetrical, brown-pigmented patch across cheeks, forehead, nose and upper lip?
Melasma
A non-healing painless ulcer associated with a chronic scar is indicative of?
Squamous cell carcinoma (SCC)
Pellagra is due to deficiency in what?
B3
Eruption started as a small erythematous annular patch, slowly enlarging into polycyclic patches with a wood-grain appearance?
Erythema gyratum repens
Flexural psoriasis?
Topical steroid
Blisters, onycholysis, hyperpigmentation and hypertrichosis - b/g of Hep C?
Porphyria cutanea tarda
Investigation for dermatitis herpetiformis?
Skin biopsy
First line for plaque psoriasis?
Topical vit D analogue + steroid
Acne vulgaris in pregnancy?
Oral erythromycin
Pompholyx eczema may be precipitated by?
Humidity
Management of SCC on lip?
Mohs surgery
On examination there are a number of 3-4 mm smooth, firm, papules which are hyperpigmented and centrally depressed. What is the most likely diagnosis? B/G T2DM
Granuloma annulare
Erythema nodosum - 2 commonest causes?
Sarcoid and TB
Common complications of seborrhoeic dermatitis?
OE and blepharitis
Peri-umbilical blistering in pregnancy?
Pemphigoid gestationis
Venous ulcer investigation?
ABPI
Dementia, diarrhoea, dermatitis?
Niacin def
Which abx most associated with SJS?
Cotrim
Antibodies in pemph vulgaris?
Antibodies against desmoglein 3
Orange peel shin lesions?
Pretibial myxoedema
Necrolytic migratory erythema (NME) is a rare skin condition that is most commonly associated with?
Glucagonoma
Systemic mastocytosis diagnostic test?
Urinary histamine - stem will mention urticarial skin lesions
Eczema herpeticum is a primary infection of the skin caused by herpes simplex virus (HSV) and which types?
HSV I + II
Irreversible skin pigmentation in acne?
Minocycline
Eczema stepwise management?
Mild - hydrocortisone 1
Moderate - clobetasone 0.05
Severe - betamethasone 0.1
Potent - clobetasol 0.05
Pigmentation of nail bed affecting proximal nail fold suggests melanoma (Hutchinson’s sign) - type of melanoma?
Acral lentiginous melanoma
Eczema herpeticum causes?
Coxsackie and HSV
HH7 association?
Pity rosea
Complication of carbamazepine use?
Erythema multiforme
How quickly does erythema nodosum heal?
1-2 months without scarring
