Dermatology

Question 1

erythrasma causes, ix, mx

Answer 1

corynebacterium minitissimi
Ix: wood slit lamp = coral red fluorescence
Tx: topical miconazole

Question 2

cause of erysipelas

Answer 2

strep pyogenes

Question 3

causes of Koebner’s phenomena

Answer 3

Vitligo
Psoriasis
Lichen Planus

Question 4

cause of SJS/TEN

Answer 4

secondary to drug reaction
NSAIDs, Phenytoin, Penicillin

Question 5

Erythroderma causes

Answer 5

eczema
psoriasis
drugs
lymphoma

Question 6

Sebhorrhoeic Dermatitis links

Answer 6

linked to otitis externa
blepharitis

Question 7

cause of Pityriasis Rosea

Answer 7

HHV-7

Question 8

pathogenesis of Pityriasis Rosea

Answer 8

recent viral infection
herald patch
erythematous oval scaly patches
self limiting

Question 9

treatment of chronic plaque psoriasis

Answer 9

steroid
Vit D analogue
coal tar phototherapy
systemic immune modulation

Question 10

Eczema treatments

Answer 10

emollients
corticosteroids
topical calcineruin inhibitors
banadages

Question 11

treatment of headlice

Answer 11

malathion

Question 12

lichen planus surfaces and causes

Answer 12

gold
quinine
thiazides

Question 13

cellulitis Eron classification

Answer 13

1. no signs of systemic toxicity, no uncontrolled co-morbidity
2. systemically unwell or systemically well WITH co-morbidity
3. significant systemic upset OR unstable co-morbidity
4. sepsis, necrotising fascitits

Question 14

cause of Erysipelas

Answer 14

strep pyogenes

Question 15

S/S of erysipelas

Answer 15

well demarcated superficial skin lesion

Question 16

Erythrasma cause

Answer 16

corynebacterium minutissimum

Question 17

S/S erythrasma

Answer 17

flat, scaly pink/brown/rash in axilla

Question 18

necro lipodica diabeticorum

Answer 18

S/S: shiny, painless areas of yellow/red skin
on shins of diabetics

Question 19

Abs in bullous pephigoid

Answer 19

Abs against BM

Question 20

Abs in pemphigus vulgaris

Answer 20

Abs against desmosomes

Question 21

Erythema multiforme

Answer 21

hypersensitivity reaction
1. Infection (HSV, mycoplasma)
2. Drugs (Barbs, NSAIDs)

Question 22

Dermatofibroma

Answer 22

appears following trauma

Question 23

Seborrhoeic Keratoses

Answer 23

greasy, stuck on, cauliflower like growth

Question 24

Bowen’s disease

Answer 24

SCC in situ
Red/brown scaly plaques

Question 25

tx of Bowen’s disease

Answer 25

5-FU
Cryo/cautery

Question 26

appearance and cause of erysipelas

Answer 26

sharply defined superficial infection by S. pyogenes