Lecture 3 - derm Flashcards Preview

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Flashcards in Lecture 3 - derm Deck (18):
1

Location:
Stasis dermatitis
Seborrheic dermatitis
Atopic dermatitis
Psoriasis

Stasis dermatitis - lower legs
Seborrheic dermatitis - scalp
Atopic dermatitis - flexor surfaces
Psoriasis - extensor surfaces

2

Etiology
Stasis dermatitis
Seborrheic dermatitis
Atopic dermatitis
Irritant dermatitis
Allergic contact dermatitis

Stasis dermatitis - lower extremity edema
Seborrheic dermatitis - malassezia furfur
Atopic dermatitis - filaggrin
Irritant dermatitis - common irritant
Allergic contact dermatitis - common allergens

3

Misc facts
Atopic dermatitis
Allergic contact dermatitis
Psoriasis

Atopic dermatitis - associated with asthma and allergic rhinitis
Allergic contact dermatitis - delayed type hypersensitivity IV, confirmed with patch testing
Psoriasis - may be associated with increased risk of cardiovascular disease

4

common skin diseases associated with:
infants (birth-2 years)

□ Generalized eruption:
erythematous papules, redness, scaling and areas of lichenification

5

common skin diseases associated with:

□ Involvement of flexural skin
® Antecubital fossa
® Popliteal fossa
® Neck
® Wrists
® Ankles

6

common skin diseases associated with:
Adult (>12 years)

□ Dry Skin (Xerosis)
□ Keratosis Pilaris
□ Ichthyosis vulgaris
□ Hyperlinearity of the palms

7

Location:
Stasis dermatitis
Seborrheic dermatitis
Atopic dermatitis
Psoriasis

Stasis dermatitis - lower legs
Seborrheic dermatitis - scalp
Atopic dermatitis - flexor surfaces
Psoriasis - extensor surfaces

8

Atopic dermatitis diagnostic criteria
Q

Must have: Itchy skin +Plus

• Three or more of the following:
o History of involvement of skin creases (or face if pt < 10 yrs)
o Personal history of asthma or hay fever (or FH of atopic disease if pt < 4 yrs)
o History of dry skin within the last year
o Visible flexural eczema (or face if pt < 4 yrs)
o Onset under 2 years of age

9

Most common type of contact dermatitis

Irritant Contact Dermatitis

10

Non-immunologically mediated rash
vs
Complex immune mediated rash

Non-immunologically mediated rash
- Irritant Contact Dermatitis

Complex immune mediated rash (type IV)
-Allergic Contact Dermatitis
- Drug eruptions

11

cellulitis vs allergic dermatitis

○ Cellulitis
- More painful/tender
- More In the dermis and subcu
- warm
- both sides can be affected, but more so unilateral involvement

○ Allergic dermatitis
§ More itchy
§ More epidermis

12

"psoriasis vulgaris" affects what % of pop? what triggers it?

Q
- Affects 2% of the population (takes genetic disposition + environmental trigger)

13

5 main types of psoriasis:

1. Plaque
2. Gutatte
3. Inverse (think intertriginous)
4. Pustular
5. Erythrodermic

14

Are nail changes associated with atopic dermatitis? Psoriasis?

No for atopic
yes for psoriasis

15

Auspitz sign

pinpoint bleeding upon scraping
- sign of psoriasis

16

Exanthemous drug eruptions

aka maculopapular eruptions aka morbilliform eruptions aka drug rashes
- Most common type of drug reaction in skin
- Usually cell-mediated type IV hypersensitivity (just like contact dermatitis)
- Drug Eruptions differential dx = Viral Exanthem
(Viral infections enhance the risk of drug eruption)

17

Urticaria

Hives)

Immediate type I hypersensitivity reaction mediated by IgE antibodies

18

most common complication seen with chickenpox.

Secondary infection or cellulitis