Derm Flashcards

1
Q

Tinea pedis Ix

A

Skin scrape

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2
Q

Herpes simplex Ix

A

Viral swab

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3
Q

Impetigo Ix

A

Bacterial swab

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4
Q

Hyperkeratosis and Munro abscesses?

A

psoriasis

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5
Q

in Porphyria cunea tarda what is there a build up of

A

uropophinogen

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6
Q

What could be the cause for a child crying when in direct sunlight

A

Erythropoietic Protoporphyria.

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7
Q

1st line treatment for Acne rosacea

A

topical metronidazole

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8
Q

1st line treatment for acne vulgaris

A

Benzoyl Peroxide [can add topical clindamycin]

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9
Q

What is epidermolysis bullosa

A

breakdown of anchoring between epidermis and dermis

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10
Q

what is erythema multiform associated with

A

mycoplasma pneumonia

HSV

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11
Q

treatment for Dermatitis herpetiformis and what is it associated with

A

Oral dapasone
gluten free diet

coeliac disease

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12
Q

acne rosacea tx and what is it associated with

A

mild = topical metronidazole [plus azeliac acid]

mod = PO tetracycline or erythromycin

blepharitis

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13
Q

skin biopsy of pemphigus vulgaris

A

IgG crazy paving/chicken wire pattern in epidermis

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14
Q

skin biopsy of bullous pemphigoid

A

linear IgG deposits across basement membrane

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15
Q

which has mucosal involvement and which does not - from pemphigus and pemphigoid

A

Pemphigus = mucosal involvement

Pemphigoid = no mucosal involvement

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16
Q

bacteria that causes lyme disease and 1st stage skin condition seen

A

borrelia burgdorferi

erythema migrans “bulls-eye rash”

17
Q

cellulitis treatment

A

mild = flucloxacillin 1g qds for 7 days
if pen allergic = doxy PO 100mg BD for 7 days

severe = IV flux 1g QDS
if pen allergic = IV Vancomycin (step down to PO Doxy)

18
Q

what is the most common cause of fungal nail infections

A

trichophyton rubrum

19
Q

most common cause and tx of necrotising fasciitis

A

cause = grp A strep [pyogenes]

Flux 2g IV + Clindamycin 1.2 IV + Gent 7mg/kg
and surgical debridement

If pen allergic = just Clindamycin and Gentamicin

20
Q

preferred Tx for actinic keratosis

A

5-FU

[if mild = can use topical diclofenac]

21
Q

what is the other name for seborrhoeic keratosis

A

basel cell papilloma

22
Q

what type of melanoma is described as “red/black lump, bleeds easily, see on sun exposed skin”

A

nodular melanoma

- aggressive, invade early

23
Q

woman with brown patch all her life

A

lentigo mealigna

24
Q

pityriasis versicolour features

A

hypopigmented, pink or brown (hence versicolor).

May be more noticeable following a suntan

25
Q

pityriasis versicolour Tx

A

1st line = topical ketoconazole

26
Q

where might pyoderma gangrenosum affect and what is Tx

A

stoma site

1st line = PO steroids
2nd line = Infliximab

27
Q

what drug can exacerbate plaque psoriasis

A

beta blockers

28
Q

list steroid creams from mild to potent

A

mild = hydrocortisone
moderate = clobetasone
potent = betamethasone
v potent = dermovate

29
Q

different skin types

A
I: Never tans, always burns 
II: Usually tans, always burns
III: Always tans, sometimes burns
IV: Always tans, rarely burns
V: brown skin, e.g. Indian
VI: Black skin
30
Q

what rash may appear in a fir-tree pattern

A

Pityriasis rosea

[get herald patch, followed by rest of rash = self-limiting]

31
Q

psoriasis Tx

A

1st line = topical steroid and topical Vit D analogue once daily

2nd line = up vitamin D analogue to twice daily

3rd line = up steroid to twice daily

4th line = immunosuppression

32
Q

what is eczema herpeticum

A

primary infection of eczema by herpes simplex virus 1 or 2

get monomorphic punched out lesions

33
Q

Tx for eczema herperticum

A

admit and give IV acyclovir