Dermatology

Question 1

A 6 year-old boy presents with 2 weeks of itching around the hands, elbows, knees, waist and groin. The itching is worse at night. He has a rash on his hands as shown above. What is the most likely diagnosis?

Hand, tiny little red dots in clusters

Question 1Select one:

a.
Scabies

b.
Eczema

c.
Flea bites

d.
Body lice

Answer 1

Scabies

Question 2

This 2 year old boy has been admitted for treatment of severe impetigo on all limbs (left arm shown here).

In addition to antibiotics, what topical treatment would be helpful for this child’s impetigo?

Question 2Select one:

a.
Topical daily mupirocin cream

b.
Potent topical steroid ointment

c.
Permanganate or bleach baths

d.
Twice daily moisturiser lotion

Answer 2

Permanganate or bleach baths

oxidising agent with aseptic properties. bleach decreases bacterial load

Question 3

What is the likely organism causing this skin rash?
Crusty lesion by mouth

Question 3Select one:

a.
Herpes simplex virus

b.
Coxsackie type b virus

c.
Mycobacterium leprae

d.
Staphylococcus aureus

Answer 3

Staph

Impetigo

Question 4

The child in the picture below is suffering a potentially severe complication of atopic dermatitis due to a virus infection. What is the virus?
Boy with red vesicles all over face

Question 4Select one:

a.
Measles (morbilli) virus

b.
Human papilloma virus

c.
Molluscum contagiosum

d.
Herpes simplex virus

Answer 4

Herpes simplex virus

Herpe eczema, tiny painful vesicles

Question 5

A 6 month old boy has a nappy rash. The rash has come on since he was treated for otitis media. It is consists of a ring of coalescing red spots around the anus. What is the MOST LIKELY cause of the rash?

Question 5Select one:

a.
Ammoniacal dermatitis

b.
Excoriated scabies

c.
Perianal candidiasis

d.
Staphylococcal impetigo

Answer 5

Perianal candidiasis

Question 6

A 4 month old girl presents with this rash which has been present for several weeks. She is otherwise well and feeding normally. The skin was normal at birth. She sleeps well at night. Taking into account the clinical presentation, appearance and distribution of the rash, what is it called?

Answer 6

Seborrhoeic dermatitis

Chronic inflam disease matches distribution of sebaceous glands

(head, neck, groin)

Question 7

A 6-year-old boy has a very itchy rash over the wrists, arms and trunk. On examination there are red papules and scratch marks in these regions and in the web spaces between the fingers. What is the likely cause for this rash?

Question 7Select one:

a.
Scabies

b.
Impetigo

c.
Urticaria

d.
Eczema

Answer 7

Scabies

Question 8

A 4-year-old unimmunised girl presents with onset in the last 24 hours of a widespread macular and coalescing rash, worse on the limbs. She is scratching vigorously and the rash in places comes up in larger raised pale areas.

What is the likely cause of the rash?

Question 8Select one:

a.
Measles

b.
Varicella

c.
Urticaria

d.
Eczema

Answer 8

Urticaria

Question 9

A five year old boy presents with a two day history of colicky abdominal pain and one day history of a rash on his buttocks and extensor surfaces of his arms and legs. He is also refusing to walk. He has no fever or vomiting, and looks well apart from occasional abdominal pain. He has mild erythema, tenderness and swelling of his left ankle and the rash shown below.

What is the most likely diagnosis?

Answer 9

Henoch-Schönlein purpura

Can cause arthalgia/arthritis, renal involvement

Question 10

A six year old girl presents with a two week history of “spots” on her trunk. The lesions are not itchy and she is otherwise completely well. On examination she has multiple dome shaped lesions on her chest and back, predominantly in both axillae. The lesions each have a small central depression. Two of the lesions are shown here.

What is the likely diagnosis?
.
Herpes varicella/zoster

b.
Herpes simplex infection

c.
Molluscum contagiosum

d.
Neurofibromatosis Nf1

Answer 10

Molluscum contagiosum

Shiny, umbilicated papules

Question 11

This infant has a congenital skin condition which can be complicated by eye and cerebrovascular involvement. What is the diagnosis?

Question 11Select one:

a.
Sturge-Weber syndrome

b.
Gorbachev syndrome

c.
Congenital herpes infection

d.
Infantile haemangioma

Answer 11

Sturge-Weber syndrome

Port wine stain

Question 12

This 16 year old girl has at least a dozen large tan macules, of 2cm or more in size.

What is the probable cause of this skin problem?

Acanthosis nigricans

b.
Congenital melanocytic naevi

c.
Chronic sun exposure

d.
Neurofibromatosis NF1

Answer 12

Neurofibromatosis