Boards: Derm (Pp)

Front 1

Auspitz Sign

Back 1

pinpoint bleeding from scales of psoriatic lesion removal

Front 2

Diascopy

Back 2

Glass slide test
clear glass against lesion
erythema will blanch
purpura/hemorrhagic lesions will not

Front 3

KOH Test

Back 3

Use on hair, skin or nails
10-20% KOH
Dissolves keratin, makes sample clear
Septated fungal hyphae can be seen

Front 4

Nikolsky Sign

Back 4

Epidermal detachment
caused by lack of skin cohesion
Seen in Bullous Diabeticorum

Front 5

Shave Biopsy

Back 5

Lesions confined to epidermis
i.e. seborrheic keratoses or molluscum contagiosum

Front 6

Punch Biopsy vs. Excisional Biopsy

Back 6

Punch: for inflm and inflitrative ds
-produces full thickness specifmen

Excisional: for dermal and subQ cysts and tumors
-**DxOC for Malignant Melanoma
-Can be used for lesions > punch size

Front 7

Tzanck Test

Back 7

For Dx viral ds
-H. Simplex, H. Zoster, Varicella, Molluscum cont.
-scrape fluid and base of vesicle
-In herpes = multinucleate giant cells

Front 8

Wood's Light

Back 8

360nm wavelength UV light
-Erythrasma/Corynebacterium = coral red
-Pseudomonas = green

Front 9

Contact Dermatitis

Back 9

Contact with natural or synthetic substances
-Rubber from shoes, poison ivy, nickel
-Inflm of epi & derm
Types:
a) Irritation - no Ig, single exposure
b) Allergic - IgE, 2* exposure

Front 10

Atopic Dermatitis

Back 10

Same presentation as Contact
-Low threshold to pruritis
-Triggered by temp change, stress, menstration
Types:
a) Infantile
b) Childhood
c) Adult
Same presentation as Contact

Front 11

Urticaria

Back 11

Hives
-Allergic Rxn = transient puritic wheals or
small erythematous papules
-often a/w hx of atopic dermatitis
-Causes: food, Abx, parasites
Tx: Antihistamines

Front 12

Nummular (Discoid) Eczema

Back 12

Coin shaped plaques
-small papules/vesicles on a eryth base
-MC in lower legs of older men
-a/w bacterial infection
Tx: dicloxacillin or erythromycin

Front 13

Lichen Simplex Chronicum (Neurodermatitis)

Back 13

Circumscribed lichenification
-result of trauma or scratching

Front 14

Stasis Dermatits

Back 14

Dermatitis of the lower leg from PVD
-MC prox to med mall
+/- ulcer
-a/w brown hemosiderin hyperpigmentation

Front 15

Dyshidrotic Eczematous Dermatitis
(Dyshidrosis)

Back 15

Vesicular hand and foot eczema w/ pruritis
-MC sides of fingers and soles of feet
-deep seated small vesicles - tapioca appearance
-sweating plays no role in pathogenesis

Front 16

Seborrheic Dermatitis / Eczema

Back 16

Chronic Imfl. w/ scaling and redness
-worse in winter
-MC seen on face and areas w/sweat glands (seborrhea = sweat glands)
-Tx: shampoos and hydrocortisone cream

Front 17

Pyoderma Gangrenosum

Back 17

Large ulcers w/ purple overhanging edges
A/w GI ds: Chrohn's & Ulc. Colitis

Front 18

Impetigo

Back 18

Bacterial Infection
-superficial
-Staph aureus
-small blisters, may break = crusts
-golden yellow crusts, "stuck on" appearance
Bullous Impetigo, more contagious
Tx: Bactroban, oral PCN, Erythromycin

Front 19

Pitted Keratolysis

Back 19

Bacterial Infection
-superficial pitting of stratum corneum (outer layer)
-a/w hyperhidrosis and bromhidrosis
-Cornybacterium
-Tx: Erythro

Front 20

Erythrasma

Back 20

Bacterial Infection
-intertriginous areas (skin folds)
-Corynebacterium
-Coral-red on wood's lamp
-MC 3rd webspaces
Tx: Erythro

Front 21

Cellulitis

Back 21

Bacterial Infection
-ct layer skin infection
-MC Group A Strep or S. aureus
-spreads rapidly
-Tx: Rifampin/Bacitracin or Cipro/Bacitracin

Front 22

Folliculitis

Back 22

Superficial bacterial infection of hair follicle
-S. aureus
-Tx: moist heat, open pores
Becomes furuncle if untreated

Front 23

Furuncle

Back 23

Deep bacterial infection of hair follicle
-May need I&D