Dermatology

Question 1

Which organism most often causes bullous impetigo?

Answer 1

Staph aureus

Question 2

How is bullous impetigo treated?

Answer 2

Systemic abx - flucloxacillin

Question 3

What are the ocular signs of albinism?

Answer 3

Failure to develop a fixation reflex
Pendular nystagmus
Photophobia causing frowning

Question 4

Is the AD or AR form of epidermolysis bullosa more severe?

Answer 4

AR form

Question 5

When does infantile seborrhoeic dermatitis present?

Answer 5

First 3 months life

Question 6

How is mild seborrhoeic dermatitis treated?

Answer 6

Emollients

Question 7

How is more persistent or severe seborrhoeic dermatitis treated?

Answer 7

Sulphur and salicylic acid ointment for scaling
Mild corticosteroid +/- antibacterial and antifungal agents

Question 7

What 2 commonest pathogenic organisms can cause secondary infection in atopic eczema?

Answer 7

Staph aureus
HSV

Question 7

What percentage of children with atopic eczema has settled by age 16?

Answer 7

75%

Question 8

What percentage of children with atopic eczema has settled by age 12?

Answer 8

50%

Question 9

How are viral warts on hands or feet typically treated?

Answer 9

Salicyclic acid and lactic acid paint or glutaldehyde 10% lotion
Cryotherapy in older children

Question 10

What does the typical lesion in molluscum contageosum look like?

Answer 10

small, skin-coloured pearly papules with central umbilication

Question 11

How does tinea capitis usually present?

Answer 11

Scaling and patchy alopecia with broken hairs
Woods light may reveal bright green/yellow fluorescence

Question 11

Where do scabies lesions typically occur in older children?

Answer 11

Finger and toe webs, flexor aspects of wrists, belt line, around nipples, penis and buttocks

Question 12

Where do scabies lesions typically occur in younger children?

Answer 12

Palms and soles

Question 13

What is the treatment of scabies?

Answer 13

Permethrin cream 5% below the neck, left on for 8-12hours then washed off
Face and scalp included in infants
OR
Benzyl benzoate 25% left on for 12hours then washed off#
OR
Malathion lotion 0.5% left on for 12hours

Question 14

How is head lice treated?

Answer 14

Dimeticone 4% or malathion 0.5% applied into scalp and left overnight, then hair shampooed following morning
Repeated 1 week later
Wet combing every 2-3days for 2 weeks

Question 15

What does guttate psoriasis appear as?

Answer 15

raindrop like lesions which are scaly and on trunk and upper limbs

Question 15

In which condition does a ‘Christmas tree’ rash occur?

Answer 15

Pityriasis Rosea

Question 15

What is pediculosis capitis?

Answer 15

Headlice

Question 16

In which condition does a herald patch occur?

Answer 16

Pityriasis Rosea

Question 16

Which condition has exclamation mark hairs?

Answer 16

Alopecia