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Dermatology > Derm Dx > Flashcards

Derm Dx Flashcards

(47 cards)

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1
Q

Eczematous dermatitis

A

UK Working Party’s Criteria

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2
Q

Drug eruptions (fixed)

A

Confirmed by punch biopsy

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3
Q

Lichen planus

A

Clinical presentation Punch biopsy

Test for HepC

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4
Q

Pityriasis rosea

A

Clinical KOH prep r/o fungus RPR

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5
Q

Psoriasis

A

Clinical Labs to r/o RA
Path: acanthosis w/ regular elongations of rete ridges “test tubes in a row”
Koebners

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6
Q

Erythema multiforme

A

Clinical Skin biopsy when uncertain

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7
Q

Stevens - Johnson syndrome

A

Biopsy

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8
Q

Toxic epidermal necrolysis

A

Biopsy

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9
Q

Bullous pemphigoid

A

Biopsy, ELISA Immunofluorescence

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10
Q

Acne vulgaris

A

Evaluate hyperandrogenism in F if other s/s

Mild: comedones +/- a few pustules Mod: comedones + lots of pustules/papules Severe: nodules (>5mm) or cysts

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11
Q

Rosacea

A

Persistent central face erythema for 3+mo Other clinical s/s

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12
Q

Actinic keratosis

A

Biopsy

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13
Q

Basal cell carcinoma

A

Punch or shave biopsy

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14
Q

Melanoma

A

Full thickness wide excisional biopsy + lymph node biopsy

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15
Q

Squamous cell

carcinoma

A

Biopsy

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16
Q

Lice

A

Comb/visualization (nits at base of hair shaft) Live nits fluoresce under wood’s lamp

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17
Q

Scabies

A

Look for mites, eggs, or feces in scraping under microscope

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18
Q

Spider bites

A

BW: pain @ bite site .5-2hrs, Muscle pain/spasms/rigidity lasting 1-3 days BR:burning, morbilliform rash- erythema at bite site 3-4 hrs ->blanching (vasoconstriction)-> red halo-> hemorrhagic bullae forms eschar-> necrosis in 10%

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19
Q

Condyloma acuminatum

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A

Application of acetic acid Colposcopy Biopsy Pap smear HPV DNA detection

20
Q

Viral exanthem (Rubeola)

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A

Rash lasts 7d +/- fever w/ rash

21
Q

Viral exanthem (Rubella)

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A

Clinical Specific IgM antibody

22
Q

Viral exanthem (5th Dz)

23
Q

Herpes simplex

24
Q

Molluscum contagiosum

25
Varicella -zoster
Clinical
26
Verrucae
Cl8nical
27
Cellulitis
H+P Gram stain and Cx WBC ESR Blood Cx X-ray, MRI, CT
28
Erysipelas
H+P Gram stain and Cx WBC ESR
29
Impetigo
Clinical Diagnosis: Highly contagious May have pruritus/pain. Usu no systemic sx’s Nonbullous: MC type. macules/papules→ vesicles/pustules, honey-colored crust. MC on face and extremities Bullous: Exfoliative s aureus A/B toxins. Vesicles enlarge to form bullae. MC on trunk Ecthyma: Infection into dermis
30
Candidiasis
MC moist, macerated areas Pruritic rash, beefy red erythema w/ distinct, scalloped borders & satellite lesions
31
Tinea Capitis
Scaly patches w/ alopecia, pruritus, pustules, scarring
32
Tinea corporis
Erythematous plaques scaling cracking vesicles
33
Tinea cruis
Diffuse red rash on grain or scrotum
34
Tinea pedis
Pruritic scaly eruption rash between toes or hyperjeratosis on soles, medial lateral surface of feet or vesiculobullous on medial feet
35
Onychomycos is
Opaque, thickened, discolored, and cracked nails w/ subungual hyperkeratinization
36
Pityriasis veriscolor
``` Persistent rash w/o tx Hyper/hypo-pigmented, well-demarcated round/oval macules w/ fine scaling, can coalesce into patches, involved skin doesn’t tan. KOH prep (hyphae & spores “spaghetti & meatball” Woods lamp -yellow-green fluorescence ```
37
Alopecia areata
Exclamation point hairs
38
Onychomycosis
Opaque, thickened, discolored, and cracked nails w/ subungual hyperkeratinization
39
Acanthosis nigricans
Clinical
40
Burns
1st: cap refill intact, blanches 2nd: cap refill intact, blanches 3rd: Absent cap refill 4th: Absent
41
Hidradenitis suppurativa
Clinical
42
Lipomas / Epithelial inclusion cysts
Clinical Nothing!!!
43
Melasma
Hyperpigmentation of face
44
Pilonidal Dz
Butts
45
Pressure ulcers
Stage I: Superficial, nonblanchable redness that does not dissipate after pressure is relieved. Stage II: Epidermal damage extending into the dermis. Resembles a blister or abrasion Stage III: Full thickness of the skin and may extend into the sub-q layer Stage IV: Deepest. Extends beyond the fascia, extending into muscle tendon or bone
46
Urticaria
Clinical
47
Vitiligo
Clinical Koebner phenomenon

Dermatology (2 decks)

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