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YEAR 4 > Dermatology > Flashcards

Dermatology Flashcards

1
Q

Penicillins, Carbamazapine, Lamotrigine and Phenytoin are all known causes of Stevens-Johnson syndrome, name 4 more.

A

Sulphonamides
Oral contraceptive pill
Allopurinol
NSAIDs

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2
Q

What type of infection precipitates guttate psoriasis?

A

Streptococcal infection (usually 2-4 weeks prior appearance of the lesions).

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3
Q

What are the features of guttate psoriasis?

A

Tear drop papules on the trunk and limbs
Tends to be acute onset over days.

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4
Q

What is the management of guttate psoriasis?

A

Most cases resolve spontaneously in 2-3 months
Topical agents (the same for psoriasis)
UVB phototherapy
Tonsillectomy may be indicated if there is recurrent episodes.

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5
Q

What are the features of pityriasis versicolor?

A

Most commonly affects the trunk
Patches may be hypopigmented, pink or brown.
Scale is common
Mild pruritis

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6
Q

What are the predisposing factors for pityriasis versicolor?

A

Healthy individuals
Immunosuppression
Malnutrition
Cushing’s

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7
Q

What is the management of pityriasis versicolor?

A

Topical antifungal - ketoconazole shampoo
If failure to respond - consider alternative diagnoses (send scrapings) + oral itraconazole.

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8
Q

What is the most aggressive subtype of melanoma? Why?

A

Nodular
Invades aggressivley and metastasises quickly.

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9
Q

Pregnancy and malignancy are two of the causes of erythema nodusum, name 3 more.

A

Infection: streptococci and TB
Systemic disease: sarcoidosis, IBD and Behcet’s
Drugs: Penicillins, sulphonamides and COCP

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10
Q

What are the features of a pityriasis rosea rash?

A

Herald patch (normally on the trunk)
Followed by erythematous, oval, scaly patches.
The rash runs with the lines of Langer.
May be preceded by URTI.

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11
Q

What usually precedes pityriasis rosea?

A

Viral infection

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12
Q

How long does it ususally take for the rash in pityriasis rosea to resolve?

A

6-12 weeks

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13
Q

What is the firstline treatment for lichen sclerosus?

A

Potent topical steroids

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14
Q

Patient presents with skin discolouration on her legs, a reddish-blue net-like pattern of discolouration (non-blanching) that is associated with cold weather. What is the most likely diganosis? What condition is this associated with?

A

Livedo reticularis
SLE

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15
Q

What rash can be associated with herpes simplex virus?

A

Erythema Multiforme

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16
Q

What is the typical clinical description of the rash seen in erythema multiforme?

A

Early lesions are papular and then become target lesions. Erythematous. Usually found on extensor surfaces.

17
Q

What is the firstline treatment for pyoderma gangrenosum?

A

Oral prednisolone

18
Q

What is the managment for a symptomatic chronic subdural haemorrhage?

A

Burr hole evacuation

19
Q

Which malignancy is most commonly associated with ancanthosis nigricans?

A

Gastrointestinal malignancy

20
Q

What is the school exclusion advice with molluscum contagiosum?

A

The child can go to school but they should avoid sharing clothes, towels etc due to infectious nature.

21
Q

Describe the typical rash that presents with shingles.

A

Maculopapular erytheamatous rash with vesicles and crusting. Dermatomal distribution. Associated with ‘stabbing’ pain.

22
Q

Beta blockers and lithium are two drugs that are known to exacerbate psoriasis, name 4 more.

A

NSAIDs
Anti-malarials
ACEi
Infliximab

23
Q

What is the firstline treatment for hyperhydrosis?

A

Aluminum chloride (topical)

24
Q

What is the firsline treatment for lichen planus?

A

Potent topical steroids

25
Q

What is Erysipelas and how is it differentiated from cellulitis?

A

Bacterial infection caused by Streptococcus pyogenes and has well defined, raised border.

26
Q

What medication is known to worsen perioral dermatitis?

A

Topical steroids

27
Q

What is the organism thought to be associated with Seborrhoeic dermatitis?

A

Malassezia furfur

28
Q

What is the causative organism for erysipelas?

A

Streptococcus pyogenes

YEAR 4 (11 decks)

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