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Derm Andrews > 6- Contact Derm > Flashcards

6- Contact Derm Flashcards

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Dermatology Board Prep flashcards
1
Q

Inflammatory reaction of the skin from exposure to a substance that causes eruptions

No previous exposure necessary

A

Irritant contact dermatitis

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2
Q

Acquired sensitivity to various substances that produce inflammatory reactions only in persons who have been previously sensitized

A

Allergic contact dermatitis

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3
Q

Pain and burning more common in this type of contact dermatitis

A

Irritant

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4
Q

Alkalis penetrate and destroy deeply because they:

A

Dissolve keratin

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5
Q

Principal compounds in alkalis

A

Sodium
Potassium
Ammonium
Ca hydroxide

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6
Q

Powerful acids are______ whereas weaker acids are _______

A. Astringent
B. Corrosive

A

B

A

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7
Q

What type of acid produces a brownish charring of the skin, beneath which is an ulceration that heals slowly

A

Sulfuric acid

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8
Q

This acid is used more widely than any other acid in industry

A

Sulfuric acid

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9
Q

This acid causes deep burns

Tissue is stained yellow

A

Nitric acid

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10
Q

One of the strongest inorganic acids, capable of dissolving glass

A

Hydrofluoric acid

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11
Q

This acid is used in the manufacturing of pigments

A

Titanium hydrochloride

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12
Q

What to do if you come in contact with titanium hydrochloride

A

Wipe away

Water causes burns

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13
Q

Acid in tear gas that can cause dermatitis

A

Chloroacetophenone

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14
Q

Petrolatum dermatitis from impure petroleum jelly or lubricating oil manifests as

A

Verrucous thickening of skin

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15
Q

What type of hypersensitivity

Allergic contact dermatitis

A

Cell mediated Type IV

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16
Q

Application of substances suspected to be the cause to intact uninflamed skin usually on upper back

A

Patch test

17
Q

Patches in patch test are removed after_____ and reevaluated after ______

A

48 hours

Day 4 or 5

18
Q

In photopatch test, a standard patch test is applied for 48h then exposed to ______ J/m2 of UVA and read after another 48 hours

A

5-15

19
Q

Most frequent site for nail polish dermatitis

A

Eyelids

20
Q

Earlobe dermatitis is indicative of sensitivity from ______

A

Nickel

21
Q

Deodorant and clothing dye can cause dermatitis in the axillary area. Which part of the axilla is involved in what substance?

A

Deodorant-axillary vault

Clothing dye- axillary fold

22
Q

Most common cause of allergic contact dermatitis in florists

A

Peruvian lily

23
Q

Difference between dermatitis and fungal infection on the foot

A

Toe webs involved in fungal infections

24
Q

Dermatitis from metals is usually due to

A

Nickel and chromates

25
Q

Most common cause of allergic contact dermatitis in children and adults

A

Nickel

26
Q

Leading cause of allergic contact dermatitis associated with cosmetics

A

Fragrance

27
Q

Chemical in hair dye that can cause dermatitis

A

Phenylenediamine

28
Q

Hair bleaches contain ________ that can cause dermatitis

A

Ammonium persulfate

29
Q

Chemical found in most so called natural products that is an allergen

A

Propolis

30
Q

Most common sunscreen allergen

A

Oxybenzone

31
Q

Least irritating antiperspirant

A

Aluminum chlorhydrate

32
Q

Which drug induces the highest rate of allergic reactions

A

Clonidine

33
Q

Produce sensitization of skin when applied topically, when ingested, an acute flare at site of contact dermatitis may occur

A

Anamnestic (recalled) eruption

34
Q

Most common topical local anesthetic that can cause dermatitis

A

Benzocaine

35
Q

Antibiotics that most commonly cause dermatitis

A

Neomycin

Bacitracin

36
Q

Wheal and flare reaction occurring when a substance is applied to the intact skin

A

Contact urticaria

Derm Andrews (25 decks)

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