last flex case Flashcards

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1
Q

Scaly, annular, erythematous plaques on glabrous skin. Borders are raised, with outer edge active and scaly** (leading edge scale)**.

A

tinea corporis (ringworm)

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2
Q

+/- central clearing. Positive KOH (visualized septate hyphae, long and straight or wavy)

A

tinea corporis dx

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3
Q

type 4 hypersensitivity; Indurated, smooth, raised border, nonscaly, skin colored annular plaques and papules, usually on the extremities; typically asymp. & more in females before 4th decade

A

granuloma annulare

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4
Q

Small, fawn-covered, oval patches with fine, trailing edge scales, following the cleavage lines. Begins with a “herald patch” (AKA Christmas Tree pattern) and occurs fall & spring.

A

pityriasis rosea

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5
Q

tx of pityriasis rosea

A

topical or systemic steroids
UVA & UVB

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6
Q

Well circumscribed annular, nonscaly, plaques (wheals), with raised borders and blanched centers. Highly pruritic. Last 90 min-24 hrs

A

urticaria

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7
Q

the application of topical glucocorticoids to an unrecognized fungal infection. As a result, the clinical appearance of the initial rash is altered, becoming less scaly, more extensive, pustular, and pruritis

A

tinea incognito

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8
Q

often waxes and wanes with winter; may improve with sun or humidity exposure or with moisturizer use. Does not involve face or scalp; coin-shaped plaques often on extremities

A

nummular eczema

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9
Q

1+ annular or oval erythematous patches as a result of systemic exposure to a drug; resolve w/ hyperpigmentation left; recurs at same spot with rexposure to drug

A

fixed drug eruptions

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10
Q

rosacea tx

A

topical metronidazole

rosacea may look like SLE

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11
Q

lesion isnt very impressive in features but on exam theres a “notch” in the superior pole, as well as some mild degree of pigment heterogeneity

A

malignant melanoma in situ

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12
Q

Superficial benign fibrous histiocytoma- common solitary cutaneous, hard nodule; more common on LE and asymptomatic; dimple sign

A

dermatofibroma

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13
Q

2 tx for dermatofibroma

A

reassurance unless rapidly enlarging
surgical elliptical excisional biopsy

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14
Q

when do you refer an AK (7)

A
  • Failed cryotherapy
  • Painful or growing
  • Pigmented changes
  • Hyperkeratotic
  • Young patient w/ AK
  • Near a previous skin cancer scar
  • Hard to treat location (lips, ears, etc.)
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15
Q

XRT is a RF of which carcinoma while tanning bed is a RF of which?

A

XRT— BCC
tanning bed– SCC

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16
Q

hx of sunburn is associated with ____ while sex & age is associated with _____

which type of carcinoma

A

sex & age— BCC
sunburn— SCC

17
Q

personal family hx of skin cancer is associated with _______

A

BCC

18
Q

personal hx of AK or bowens; prior skin cancer is associated with

A

SCC

19
Q

immune suppressing drugs is associated with

A

BCC

20
Q

weakened immune sys is associated with

A

SCC

21
Q

exposure to arsenic is associated with

A

BCC

22
Q

asymptomatic small **umbilicated papules **; poxvirus spread skin to skin

A

molluscum contagiosum

23
Q

MC tx (2)

A

sharp curette works nicely
light cryotherapy in adults

24
Q

any itchy penile rash should immediately suggest this; especially if also in interdigital webspaces and on volar wrist

A

scabies

25
Q

does itching go away with tx of scabies?

A

not always, it can last for weeks even though the mite has been killed; can take antihistamine for it

26
Q

dx if suspecting scabies

A

do saline exam NOT KOH

27
Q

which abx also works on lice?

A

TMP/SMX

28
Q

initial symptom is formation of a papule at the inoculation site, followed by solitary or regional lymphadenopathy within 1-2 weeks. In most patients, the disease resolves spontaneously within 2-4 months

A

Cat scratch dz (from Bartonella henselae)

29
Q

1 cat BITE etiology

A

pasteurella multicoda

30
Q

if someone is bitten by a camel, what abx do you use? (combo)

A

Doxy + Cipro

31
Q

hot tub folliculitis agent & how its tx

A

Pseudomonas aeruginosa
fluoroquinolone

32
Q

sudden onset of erythema; heat; swelling; and a raised, indurated plaque. More superficial than cellulitis, with better demarcation; pt often complains of fever & chills (but not always); what is it & how do you tx it

A

Erysipelas
PO PCN G/VK

33
Q

spider bites usually have a ____ center

A

necrotic

34
Q

slide 106

A