Dermatology

Question 1

What is tinea incognito? (1)

Answer 1

The rash that presents when a fungal skin infection is treated inappropriately with corticosteroids and gets worse

Question 2

What is the treatment for head lice? (1)

Answer 2

Dimeticone gel

Question 3

What is the first line treatment for Psoriasis? (2)

Answer 3

Topical corticosteroid and vitamin D analogue

Question 4

What disease is dermatitis herpetiformis associated with and what immunoglobulins are present in the skin lesions?
(2)

Answer 4

Coeliac disease

IgA

Question 5

How does lichen planus present? (3)

Answer 5

Pruritic purple papules typically on the forearms, wrists and legs.
The papules typically have white lines on them call Wickham’s striae

Question 6

What is a possible complication of genital lichen planus? (1)

Answer 6

Squamous cell carcinoma

Question 7

What underlying condition is lichen planus associated with? (1)

Answer 7

Hepatitis B

Question 8

What conditions is pyoderma gangrenosum associated with? (3)

Answer 8

Rheumatoid arthritis
Crohns and ulcerative colitis
Leukaemia

Question 9

What are there antibodies agains in Bullous pemphigoid and Pemphigus vulgaris? (2)

Answer 9

BP - Hemidesmosomes

PV - Desmosomes/Desmoglein

Question 10

What bacteria is typically associated with acne? (1)

Answer 10

Propionibacterium acnes

Question 11

Describe three different red/pink birthmarks and how to differentiate them (6)

Answer 11

Salmon patch/Stork mark - Flat pink marks. Fade in the first few months, takes longer if it is on the forehead

Infantile haemangioma/strawberry marks - raised, intially rapidly increase in size in the first six months then reduce and disappear in childhood

Port wine stain - Capillary malformation, flat red/purple marks. Can deepen in colour over time and are sensitive to hormones.

Question 12

What skin sign is seen in Peutz-Jehger’s syndrome? (1)

What cancer are they susceptible to? (1)

Answer 12

Hyperpigmented macules on the lips and oral mucosa

Bowel cancer

Question 13

What is the infective cause of molluscum contagiosum? (1)

Answer 13

Pox virus

Question 14

What is the management for malignant melanoma? (3)

Answer 14

Excision with 2mm margin
Staging with Breslow’s thickness
Wide local excision - margins determined by Breslow’s thickness

Question 15

What is the Koebner phenomenon? (1)

Answer 15

When psoriatic plaques develop around a site of injury

Question 16

What disease is lupus vulgaris associated with? (1)

Answer 16

Tuberculosis