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dermatology > Dermatology Emergencies > Flashcards

Dermatology Emergencies Flashcards

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Dermatology Board Prep flashcards
1
Q

What type of reaction is erythema multiorme

A

Type 4 hypersensitivity

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2
Q

What is erythema multiforme commonly associated with

A

HSV

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3
Q

Name some other infections associated with erythema multiforme

A

TB, mycoplasma pneumoniae, strep

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4
Q

Who usually presents with erythema multiforme

A

20-40 yrs

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5
Q

Drugs associated with erythema multiforme

A

Antibiotics
Anticonvulsants
NSAIDs
Allopurinol
Antivirals / antimalarials

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6
Q

What are the 2 categories of erythema multiforme

A

Major and minor

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7
Q

Minor erythema multiforme

A

Affects skin

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8
Q

Major erythema multiforme

A

Affects skin and mucous membranes

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9
Q

How is erythema multiforme characterised

A

Sudden onset of symmetrical, target-like skin lesions with a central red spot surrounded by concentric rings

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10
Q

Where is erythema multiforme usually seen

A

On the legs

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11
Q

Symptomatic treatment of erythema multiforme

A

Oral corticosteroids
Prophylactic acyclovir in recurrence

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12
Q

What is erythroderma

A

Generalised redness and inflammation

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13
Q

Name drugs that cause erythroderma

A

Sulphonamides, penicillin, antimalarials, anticonvulsants, allopurinol

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14
Q

Conditions associated with erythroderma

A

Eczema, allergic contact dermatitis, pityriasis rubra pilaris, pemphigus and bullous pemphigoid

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15
Q

What is major characteristic of erythroderma

A

Covers >90% of the body

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16
Q

General presentation of erythroderma

A

Generalised redness and dryness
Keratoderma of palms and soles
Lymphadenopathy

17
Q

Investigations in erythroderma

A

Skin swabs, septic screen
FBC, U+Es
HIV test
Echo
Skin biopsy

18
Q

Main concern when treating erythroderma

A

Manage fluid balance and body temp

19
Q

What is toxic epidermal necrolysis

A

A maximal variant of Stevens-Johnsons syndrome

20
Q

Name some drugs that cause toxic epidermal necrolysis

A

Antibiotics
Anticonvulsants
NSAIDs
Allopurinol
Nevirapine
Meticlopramide

21
Q

Clinical sign of toxic epidermal necrolysis

A

Positive nikolsky sign

22
Q

Presentation of TEN

A

Prodromal rash, necrotic epidermis, raised flaccid blisters

23
Q

Investigations used in TEN

A

FBCs, U+Es, skin biopsy

24
Q

Management of TEN

A

Avoid skin trauma, IV fluids, analgesia

dermatology (13 decks)

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