Dermatitis DDX Flashcards Preview

Dermatology > Dermatitis DDX > Flashcards

Flashcards in Dermatitis DDX Deck (22)
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1

ACD/ICD- contact or irritant derm

DP, acute onset, contact hx positive, usually vesicular and oozing

2

Atopic dermatitis

- DP, diffuse dry scaly, allergic hx, fam hx

3

Seborrheic derm-

DP, less itchy, diffuse, scaly, greasy

4

Dyshidrotic Eczema

- DP, deep vesicles, acute, recurring, pruritic

5

Nummular Eczema –

DP, papulovesicular or scaly coin-shaped lesions, biopsy

6

Lichen simplex chronicus

– DP, usually single dry scaly lesion, chronic itch

7

Asteatotic Dermatitis

– DP, dry scaly, common in elderly, worse in winter

8

“Id” reaction –

DP, vesicular, hx of distal primary lesion, linear

9

Polymorphous Light Eruption

– DP, hx of 1st sun exposure 18-24 hours previous

10

Drug-related Eczema

– DP, hx of new drug, herb, chemical exposure

11

Psoriasis-

DP, sharply defined, dry scales, fam hx

12

Pityriasis rosea-

DP, “herald patch”; acute onset, papulosquamous eruption

13

Lichen planus –

DP, 5 P’s, in mouth, Wickham’s striae”, biopsy

14

Tinea capitis, facialis, corporis –

DP, KOH + for fungus

15

Pityriasis versicolor-

DP, fingernail scratch sign, Wood’s lamp, KOH (spaghetti and meatballs)

16

Bacterial infections –

DP, acute vesicular, subacute crusty, lab (culture +)

17

Viral infections –

DP, acute vesicular, lab (culture +)

18

SLE -

DP, fever, malaise, joint pain, lab (ANA, anti smith, double stranded DNA)

19

Secondary syphilis-

DP, lab (RPR, dark field, etc)

20

Erythema migrans-

DP, lab (PCR, Western blot, etc), hx of tick bite

21

Erythema multiforme-

DP, target lesions, following herpes, mycoplasma, drug rx

22

Scabies-

DP, hx (night itching), lab , look like little flea bites