Dermatology Flashcards
(139 cards)
Pathophysiology eczema
Defects in skin barrier
Entrance for irritants, microbes and allergens
Can stimulate an immune response
Inflammation and associated symptoms
Distribution of eczema
Face and trunk in infants
In younger children extensor surfaces
In older children flexor surfaces and creases of face and neck
Management of eczema
Avoid irritants
Emollients
Topical steroids
Wet wraps and oral cyclosporine in severe cases
Severe eczema management
Zinc-impregnated bandages Topical tacrolimus Phototherapy Systemic immunosuppressants Oral corticosteroids Methotrexate Azathioprine
Management of eczema flares
Thicker emollients
Wet wraps
Treating infections
Eczema trigger
Cold air Dietary products Washing powders Cleaning products Emotional event or stresses
Thin emollients
E45 Diprobase Oliatum cream Aveeno cream Cetraben cream Epaderm cream
Thick, greasy emollients
50:50 ointment Hydromol ointment Diprobase ointment Cetraben ointment Epaderm ointment
Side effects of topical steroids
Thinning of skin, more prone to flares, bruising, tearing, stretch marks, enlarged blood vessels (telangiectasia)
Mild steroids topical
Hydrocortisone
0.5-2.5%
Moderate topical steroids
Betamethasone valerate 0.025% (Betnovate)
Clobetasone butyrate (Eumovate)
Potent topical steroids
Fluticasone propionate 0.05% (Cutivate)
Betamethasone valerate 0.1% (Betnovate)
Very potent topical steroids
Clobetasol propionate
0.05% (Dermovate)
Eczema herpeticum causes
HSV 1 (more common) or 2 Varicella zoster virus Severe primary infection of skin Seen in children with atopic eczema Rapidly progressing painful rash
Presentation of eczema herpeticum
Widespread, painful, vesicular rash Rapidly progressing rash Monomorphic punched-out erosions (1-3mm) Fever, lethargy, irritability, reduced oral intake Lymphadenopathy
Management of eczema herpeticum
Viral swabs of vesicles
IV aciclovir
Complications of eczema herpeticum
Life-threatening
Bacterial superinfection
Psoriasis presentation
Dry, flaky, scaly, rough Faintly erythematous skin lesion Raised plaques Over extensor surfaces Elbows, knees, scalp
Rapid generation of new skin cells, abnormal buildup and thickening of skin in those areas
Plaque psoriasis
Thickened erythematous plaques with silver scales
Commonly seen on the extensor surfaces and scalp
1cm-10cm in diameter
Most common form of psoriasis in adults
Guttate psoriasis features
More common in children and adolescents
Precipitated by a streptococcal infection 2-4weeks prior to lesions appearing
Tear drop papules on trunk and limbs
Turn into plaques over time
Guttate psoriasis management
Resolves within 3-4months
Phototherapy
Tonsillectomy
Topical agents
Pustular psoriasis
Systemically unwell
Pustules form under areas of skin
Immediate admission to hospital
Erythrodermic psoriasis
Extensive erythematous inflamed areas covering most of the surface area of the skin
Skin comes away in large patches
Raw exposed areas
Medical emergency requiring admission
Specific signs associated with psoriasis
Auspitz sign: small points of bleeding when plaques are scraped off
Koebener phenomenon: development of psoriatic lesions in areas of skin affected by trauma
Residual pigmentation of skin after lesions resolve