Dermatitis

Question 1

hallmark of dermatitis

Answer 1

itchy, ill-defined, erythematous, scaly lesions

Question 2

acute presentation of dermatitis

Answer 2

papulovesicular
erythema
oedema
scaling
flexor surfaces
itch
associated atophy (asthma, hay fever)

Question 3

chronic presentation of dermatitis

Answer 3

lichenification
elevated plaques
excoriation
infection
associated atopy

Question 4

diagnosis of dermatitis

Answer 4

patch testing
skin prick
IgE bloods

Question 5

describe the process of patch testing

Answer 5

batteries of allergens are placed in small wells and applied to the back for 48 hours. reactions are then checked after 96 hours

Question 6

warnings to patient about patch testing

Answer 6

no shower for couple of days

Question 7

management of dermatitis

Answer 7

emollients
avoid irritants
topical steroids
phototherapy (UVB)
systemic immunosuppressants
targeted biological agents

Question 8

describe contact allergic dermatitis

Answer 8

delayed type 4 reaction in response to chemical, topical, etc.

Question 9

describe contact irritant dermatitis

Answer 9

trauma e.g. soap and water (implications for occupation)

Question 10

causes of atopic dermatitis

Answer 10

genetic (filaggrin)
immunological (IL-4, IL-13)
environment

Question 11

drug related dermatitis

Answer 11

type 1 or 4 reaction

Question 12

photo-induced/sensitive dermatitis

Answer 12

reaction to UV light/phototoxic drugs

Question 13

lichen simplex

Answer 13

scratching

Question 14

stasis dermatitis

Answer 14

hydrostatic pressure, oedema and red cell extravasation

Question 15

cause of eczema herpeticum

Answer 15

herpes simplex virus

Question 16

presentation of eczema herpeticum

Answer 16

monomorphic punched-out lesions

Question 17

other forms of eczema

Answer 17

discoid (single, well demarcated lesion)
seborrheic
pomphyolyx (hands and feet)