Derm

Question 1

Which organism causes tinea corporis (ringworm)?

Answer 1

Trichophytron rubrum

Question 2

What is erythema marginatum?

Answer 2

manifestation of rheumatic fever
pink/red macules or papules that spread outwards - outer edge becomes raised and red while the centre clears
not itchy or painful

Question 3

What is erythema multiforme?

Answer 3

acute eruption in response to infection (eg herpes simplex or mycoplasma)
multiple target lesions with outer ring and pale centre

Question 4

What is pityriasis rosea?

Answer 4

viral rash
starts with herald patch followed by multiple widespread plaques

Question 5

What is tinea capitis?

Answer 5

fungal infection of the scalp
cause of scarring alopecia in kids

Question 6

which fungus glows green under woods lamp?

Answer 6

microsporum

Question 7

first line treatment of chronic plaque psoriasis?

Answer 7

potent topical steroid (eg betametasone) + vitamin D analogue (eg calcipotriol)