Eczematous and Contact Dermatitis

Question 1

Describe the acute stage of eczematous dermatitis.

Answer 1

vesicles, blisters, or bullae

-erythema and pruritis

Question 2

describe the subacute stage of eczematous dermatitis.

Answer 2

• erythema, scaling, fissuring

- parched or scalded appearance

Question 3

describe the chronic stage of eczematous dermatitis.

Answer 3

lichenification, fissuring, and acentuated skin lines

Question 4

what is asteatotic dermatitis?

Answer 4

“without sebum” dermatitis
=characterized by dry scaling and fine superficial cracking due to decreased skin surface lipids (dry winter weather, harsh soaps, frequent bathing, age)

Question 5

what is atopic dermatitis?

Answer 5

(aka allergic eczema)

chronically relapsing skin eczema that presents at an early age associated with allergic rhinitis and asthma

Question 6

describe the presentation of atopic dermatitis.

Answer 6

erythematous papulovesicular eruption that evolves into dry, scaly dermatitis with accentuated skin lines (and becomes lichenified plaques over time)

Question 7

diagnose this; no primary lesion; there is a recurrent extremely pruritic rash and presents with personal history of seasonal allergies and eczema.

Answer 7

atopic dermatitis

Question 8

describe how the distribution of atopic dermatitis varies with age.

Answer 8

0-2 y/o: face, wrists, EXTENSOR surfaces; papulovesicular lesions
2-12y/o: FLEXOR surfaces; maculopapular lesions
adolescents-adults: flexor surfaces, wrists/hands/knees/feet; lichenification

Question 9

which dermatitis is brought on by stress and hyperhidrosis and is usually worse in the summer?

Answer 9

dyshdrotic eczema

Question 10

which dermatitis looks like tinea pedis (but isn’t because it frequently appears in medial heel region and sole as opposed to interdigitally)?

Answer 10

dyshidrotic eczema

Question 11

which contact dermatitis is NOT immunologically mediated?

Answer 11

primary irritant contact derm

Question 12

which contact dermatitis does not require a primary sensitization?

Answer 12

primary irritant contact derm

Question 13

which contact dermatitis comprises 80% of contact derm?

Answer 13

primary irritant contact derm

Question 14

which contact dermatitis has a delayed reaction?

Answer 14

allergic contact derm

Question 15

which contact derm has an irritant rxn that can occur right away after contact?

Answer 15

primary irritant contact derm

Question 16

which type of hypersensitivity reaction does allergic contact derm follow?

Answer 16

type 4 hypersensitivity rxn

Question 17

which contact derm is immunologically mediated?

Answer 17

allergic contact derm

delayed T-cell mediated immune response

Question 18

describe the 3 phases of allergic contact derm.

Answer 18

1. irritant phase- localized erythema
2. allergic phase- inflammation and small pruritic vesicles and papules
3. vesicular phase- bullae formation

Question 19

which contact dermatitis looks like a burn with large blisters?

Answer 19

irritant contact derm

Question 20

which contact derm appaers with erythema, vesiculation and edema?

Answer 20

allergic contact derm

Question 21

which contact derm has “stinging t hen itching”

Answer 21

irritant

Question 22

which contact derm has “itching then pain”

Answer 22

allergic contact

Question 23

which dermatitis has borders that are confined to site of exposure?

Answer 23

irritant

Question 24

which dermatitis has borders that may spread beyond the site of exposure?

Answer 24

allergic contact

Question 25

why does a phototoxic reaction to plants occur in phytophotodermatitis?

Answer 25

due to light sensitive compound called Furocoumarins (psoralens) in plants