Dermatology

Question 1

What questions might you specifically focus on in a dermatological history?

Answer 1

• Location of lesions, sun exposure
• Systemic features
• Time course and triggers
• Medications/occupation/allergies

Question 2

What is this?

Answer 2

Pityriasis rosea

Normally a sentinel patch spreads to form a Christmas tree pattern

Question 3

What are these lesions?

Answer 3

Erythema nodosum (generally these are painful and restricted to the shins)

Question 4

What is this? How does it happen?

Answer 4

Bullous pemphigoid - probably an autoimmune reaction to skin resulting in the epidermis shearing off

Question 5

What is this rash? What is the normal distribution?

Answer 5

Henoch-Schonlein purpura (a systemic vasculitis common in childhood) - generally on the lower limbs and low trunk only in an extensor distribution

Question 6

This lesion came on over the last few weeks. What is it?

Answer 6

Tinea corporis.

DDx - discoid eczema

Scaly annular lesion with outer red ring, central hypopigmentation

Question 7

What are these lesions? What causes them?

Answer 7

Molluscum contagiosum (caused by MCV)

Skin coloured papules with a central umbilicus. Can be treated in the same way as warts

Question 8

What are these lesions and how are they treated?

Answer 8

Viral warts (HPV)

Can spontaneously regress. Treatments include topical salicyclate, DCP, imiquimod, cryotherapy, curettage, diathermy etc.