Dermatology Flashcards
What is atopic dermatitis?
Hypersensitivity to allergens
Form of eczema Infants: face + nappy area
Children: flexures, neck + Dennie-Morgan folds
Adults: flexures + hands
Treatment of atopic dermatitis
Emollients, steroids, immunomodulatory therapy
What is seborrhoeic dermatitis?
Rash appears in sebaceous glands ie scalp, sides of nose, behind ears
Cradle cap in infants (starts at 2-6 months)
Thick, yellow, waxy scales
Treatment for seborrhoeic dermatitis
Adult = medicated shampoo
Infants = emollients
What is stasis dermatitis?
AKA Varicose eczema
Common in later life
Vein walls weakened, blood pools in legs forming red-brown speckles on skin which are hot and itchy
RF for stasis dermatitis?
Poor circulation, DVTs, cellulitis, varicose veins, phlebitis, obesity
Treatment for stasis dermatitis?
Lose weight, treat varicose veins, compression stockings, emollients, topical steroids
What is asteatoic dermatitis?
Eczema cracquelee
Over 60s
Appears on shins with ‘crazy paving’ appearance
Treat with emollients + steroids
What is contact dermatitis?
Result of contact with irritants or allergens
Common on hands + face
S+S psoriasis
Red, scaly plaques on extensor surfaces + scalp
Nail + joint disease in some
RF for psoriasis
Family hx
Precipitated by infection, stress + drugs
Histological findings of psoriasis
Thick epidermis (acanthosis) with saw tooth appearance
Papillary dermis close to surface
Vascular proliferation (Auspitz’s sign)
What is the clinical appearance of psoriasis explained by histology?
Scale = hyper + parakeratosis
Palpable plaques = thickening + proliferation
Red = vascular proliferation B
leeding = Auspitz’s sign
Pustulation = munro micro abscess
What is guttate psoriasis?
Raindrop psoriasis
Small, salmon pink bumps on skin - usually triggered by bacterial infection eg strep throat
Types of psoriasis
Chronic plaque
Guttate
Flexural
Erhythrodermic
Pustular
