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Flashcards in Dermatitis and Eczema Deck (28)
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1

If a patient has atopic eczema, it will be more likely that they will have another atopic condition

True or false?

True

2

Which term describes a non-specific or isolated type of eczema that has sudden onset, failure of oedema to escape and formation of vesicles?

Pompholyx dermatitis

3

Which anti-arrhythmic drug can cause photosensitivity?

Amiodarone

4

What is stasis dermatitis?

Dermatitis caused by poor venous return and due to the resulting increased hydrostatic pressure, extravation of red blood cells occurs

5

What does lichen simplex dermatitis involve?

Spongiotic dermatitis and external trauma

6

What does drug related dermatitis involve?

Spongiotic dermatitis and eosinophils

7

Which types of dermatitis solely involve spongiotic dermatitis?

  1. Contact irritant
  2. Contact allergic
  3. Atopic
  4. Photosensitive

8

What is spongiotic dermatitis?

A group of disorders that share intercellular oedema of the epidermis associated with exocytosis of lymphocytes and a papillary dermal perivascular infiltrate

9

What causes crusting around atopic dermatitis?

S. aureus infection

10

Which type of dermatitis is associated with yellow greasy scale most commonly on the head, face and neck region?

Seborrheic dermatitis

11

What are the diagnostic criteria for a diagnosis of eczema?

Itching

Plus 3 of:

  1. Age of onset < 2 years
  2. Generally dry skin
  3. History of flexural rash
  4. Personal history of atopy
  5. Visible flexural rash

12

Which dermatological condition is very similar to psoriasis, but lacks raised plaques?

Discoid eczema

13

Eczema around the neck and eyes is characteristic in which age group?

Infants

14

All types of dermatitis are spongiotic

True or false?

True

15

How is the acute phase of eczema described?

Papulovesicular erythematous lesions with oedema (due to spongiosis), oozing, scaling and crusting

16

How is the chronic phase of eczema described?

Lichenification, elevated plaques and increased scaling

17

For which reason does weeping occur with severe eczema?

Spongiosis becomes so severe, small vesicles develop and collect into blisters

18

Why do children with eczema exhibit neurocognitive impairment?

Eczema (constant itching) causes lack of sleep and lower cognitive ability during the day

19

What percentage of school children suffer from atopic dermatitis at some stage?

25%

20

What is the pathology of contact allergic dermatitis?

  1. Langerhans cells in the epidermis process antigen
  2. Antigen is displayed to TH cells in the dermis
  3. Sensitised T cell migrate to the lymphatics and then to regional nodes where antigen is amplified

21

What is the first immune cell an allergen will encounter in the epidermis?

Langerhans cell

22

What is the most common cause for contact irritant dermatitis?

Soap and detergent

Other causes include:

  1. Garlic
  2. Nickel
  3. Silver

23

Which term describes the persistence of nuclei in the keratin layer?

Parakeratosis

24

What is the main cause for the development of eczema?

Mutation in the filaggrin gene

25

What is the function of filaggrin?

A component of the skin involved in maintaining the water barrier

26

For which reason does the appearance of eczema change over time?

Scratching and ongoing inflammation

27

Anti-TNF drugs can be used to treat eczema

True or false?

False

However immunosuppressants such as azathioprine and methotrexate can be

28

Which type of eczema is associated with "punched out" skin lesions?

Eczema herpeticum