Dermatology

Question 1

Livedo reticularis

Answer 1

Purple lace discolouration of skin

Question 2

Erythema ab igne

Answer 2

Red lace discolouration in exposure to heat

Question 3

Rosacea: Mx (2)

Answer 3

1. Topical ivermectin
2. PO doxycycline

Question 4

Lichen Planus: features (4)

Answer 4

Purple
Pruritic
Papular
Polygonal on flexor surface

Question 5

Lichen Planus: Mx

Answer 5

Potent topical steroids

Question 6

Lichen Scelrosus

Answer 6

Itchy white spots on vulva of predominantly elderly
Increased risk of vulval cancer

Question 7

Blisters with no mucosal involvement

Answer 7

Bullous pemiphgoid

Question 8

Blisters with mucosal involvement

Answer 8

Pemphigus vulgaris

Question 9

Actinic keratoses: features

Answer 9

Small, crusty or scaly lesions on sun exposed skin

Question 10

Actinic keratoses: Mx

Answer 10

Fluorouracil cream

Question 11

Contact dermatitis: Ix

Answer 11

Skin patch

Question 12

Capillary haemangiomas: features

Answer 12

Not present at birth
Develop rapidly and then self resolve

Question 13

Keratocanthoma requires..

Answer 13

Urgent referral to dermatology to rule out SCC

Question 14

Scarring alopecia: causes (5)

Answer 14

1. trauma / burns
2. RT
3. Lichen planus
4. Discoid lupus
5. Tinea capitis

Question 15

Non-scarring alopecia (6)

Answer 15

1. male pattern baldness
2. drugs (cytotoxic, carbimazole, heparin, COCP, colchicine)
3. nutrition
4. autoimmune - alopecia areata
5. telegen effluvium (stress)
6. trichotillomania

Question 16

Spider naevi fill from….

Answer 16

Centre out

Question 17

Causes of eczema herpeticum

Answer 17

HSV 1 or 2

Question 18

Erythema multiforme: features

Answer 18

Target lesions
Hands & feet –> torso
Upper limbs > lower limbs
Pruritus

Question 19

Erythema multiforme: causes (7)

Answer 19

Viruses (HSV)
Idiopathic
Bacteria (mycoplasma, strep)
Drugs (penicillin, sulphonamides, carbamzepine, NSAIDs, COCP)
SLE
Sarcoid
Malignancy

Question 20

Erythema nodosum: features

Answer 20

Inflammation of SC fat
Tender erythematous nodular lesions on shins
Resolve within 6 weeks

Question 21

Erythema nodosum: causes (5)

Answer 21

Infection (strep, TB, brucellosis)
Systemic disease (sarcoid, IBD, Behcets)
Malignancy
Drugs (penicillin, sulphonamides, COCP)
Pregnancy

Question 22

Psoriasis: exacerbating factors (4)

Answer 22

Trauma
Alcohol
Drugs - BB, lithium, antimalarials, NSADIs, ACEi, infliximab
Withdrawal of steroids

Question 23

Pretibila myxoedema

Answer 23

Symmetrical erythematous lesions in Graves disease
Shiny orange peel skin

Question 24

Pyoderma gangrenosum

Answer 24

Small red papule –> deep red necrotric ulcer

Question 25

Necrobiosis lipoidicia diabeticrum

Answer 25

Shiny painless yellow / red skin
Diabetes

Question 26

Polymorphic eruption of pregnancy

Answer 26

Pruritic condition in last trimester
Emoillent, topical steroids & PO steroids

Question 27

Pemphigoid gestationis

Answer 27

Blistering pruritic lesions
PO steroids