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Dermatology > Derm Dx > Flashcards

Derm Dx Flashcards

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Dermatology Board Prep flashcards
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

A

Application of acetic acid Colposcopy Biopsy Pap smear HPV DNA detection

20
Q

Viral exanthem (Rubeola)

A

Rash lasts 7d +/- fever w/ rash

21
Q

Viral exanthem (Rubella)

A

Clinical Specific IgM antibody

22
Q

Viral exanthem (5th Dz)

A

Serologies

23
Q

Herpes simplex

A

Clinical

24
Q

Molluscum contagiosum

A

Clinical

25
Q

Varicella -zoster

A

Clinical

26
Q

Verrucae

A

Cl8nical

27
Q

Cellulitis

A

H+P Gram stain and Cx WBC ESR Blood Cx X-ray, MRI, CT

28
Q

Erysipelas

A

H+P Gram stain and Cx WBC ESR

29
Q

Impetigo

A

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
Q

Candidiasis

A

MC moist, macerated areas Pruritic rash, beefy red erythema w/ distinct, scalloped borders & satellite lesions

31
Q

Tinea Capitis

A

Scaly patches w/ alopecia, pruritus, pustules, scarring

32
Q

Tinea corporis

A

Erythematous plaques scaling cracking vesicles

33
Q

Tinea cruis

A

Diffuse red rash on grain or scrotum

34
Q

Tinea pedis

A

Pruritic scaly eruption rash between toes or hyperjeratosis on soles, medial lateral surface of feet or vesiculobullous on medial feet

35
Q

Onychomycos is

A

Opaque, thickened, discolored, and cracked nails w/ subungual hyperkeratinization

36
Q

Pityriasis veriscolor

A 
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
Q

Alopecia areata

A

Exclamation point hairs

38
Q

Onychomycosis

A

Opaque, thickened, discolored, and cracked nails w/ subungual hyperkeratinization

39
Q

Acanthosis nigricans

A

Clinical

40
Q

Burns

A

1st: cap refill intact, blanches 2nd: cap refill intact, blanches 3rd: Absent cap refill 4th: Absent

41
Q

Hidradenitis suppurativa

A

Clinical

42
Q

Lipomas / Epithelial inclusion cysts

A

Clinical Nothing!!!

43
Q

Melasma

A

Hyperpigmentation of face

44
Q

Pilonidal Dz

A

Butts

45
Q

Pressure ulcers

A

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
Q

Urticaria

A

Clinical

47
Q

Vitiligo

A

Clinical Koebner phenomenon

Dermatology (2 decks)

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