Dermatitis/Eczema Flashcards
hallmark
itchy, ill-defined erythematous scaly lesions
acute presentation
papulovesicular erythema oedema scaling itch
chronic presentation
lichenification elevated plaques increased scaling excoriation (itch) infection
where is this located?
flexor surfaces
associated atopy
asthma
rhinitis
hay-fever
food allergies
diagnosis
patch testing
skin prick
IgE bloods
describe patch testing
batteries of allergens are placed in small wells and applied to the back for 48 hours. Reactions are check after 96
(warn patient about showering, etc.)
management
emollients avoid irritants topical steroids phototherapy (UVB) systemic immunosuppression targeted biological agents
different types of dermatitis
- contact allergic dermatitis
- contact irritant dermatitis
- atopic dermatitis
- drug related
- photo-induced/sensitive
- lichen simplex
- stasis dermatitis
describe contact allergic dermatitis
delayed type 4 reaction in response to chemicals, topicals, etc.
describe contact irritant dermatitis
trauma e.g. soap and water
implications for occupation
describe atopic dermatitis
genetic (filaggrin)
immunological (IL-4, IL-13)
environment
describe reaction in drug related dermatitis
type 1 or 4 reaction
describe photosensitive dermatitis
reactions to UV light/ phototoxic drugs
describe lichen simplex
scratching (can occur in other conditions asides from eczems)
