DERMATOLOGY

Question 1

What are the common complications of seborrheoci dermatitis?

Answer 1

Otitis externa and blepharitis

Question 2

Referral criteria to dermatology for acne?

Answer 2

Acne conglobate
Nodulo-cystic acne
Mild-mod acne not responded to 2 completed courses of Tx
Mod-sev acne not responded to a Tx including an oral antibiotic
Acne with scarring
Acne with persisting pigmentary changes
Acne causing persistent psychological distress

Question 3

Which bacteria contributes to the development of acne?

Answer 3

Propionibacterium acnes

Question 4

What drugs exacerbate psoriasis?

Answer 4

BB
Lithium
Antimalarials
NSAIDs
ACEi
Infliximab

Withdrawal of systemic steroids

Question 5

What is hidradenitis suppurativa?

Answer 5

A chronic painful inflammatory skin disorder
Characterised by the development of inflammatory nodules, pustules, sinus tracts, and scars in intertriginous areas
Suspect in pts with recurrent furuncles or boils

Question 6

Whats the most common site for hidradenitis suppurativa?

Answer 6

The armpit

Question 7

Which drugs can cause erythema multiforme?

Answer 7

Penicillin
Sulphanoamides
Carbamazepine
Allopurinol
NSAIDs
COCP
Nevirapine

Question 8

How long does it take the rash from pityriasis rosea to resolve?

Answer 8

6-12 weeks

Question 9

Features of SCC?

Answer 9

typically on sun-exposed sites such as the head and neck or dorsum of the hands and arms
rapidly expanding painless, ulcerate nodules
may have a cauliflower-like appearance
there may be areas of bleeding

Question 10

What virus causes molluscum contagious?

Answer 10

Pox virus

Question 11

Does bullous pemphigoid or pemphigus vulgaris cause mucosal involvement?

Answer 11

Pemphigus vulgaris

Question 12

What is pyoderma gangrenosum?

Answer 12

A rare, non-infectious inflammatory skin condition that cause very painful skin ulceration, usually on the legs

Question 13

Causes of pyoderma gangrenosum?

Answer 13

Idiopathic 50%
IBD
RA, SLE
Haematological - lymphoma, myeloid leukaemias, myeloproliferative disorders etc
GPA
PBC

Question 14

How does pyoderma gangrenosum present?

Answer 14

Sudden small red bump -> skin breaks down revealing a deep, necrotic, painful ulcer with purple edges
Bleeds easily if touched

May also cause fever and myalgia

Question 15

What is this?

Answer 15

Pyoderma gangrenosum

Question 16

What is hereditary haemorrhagic telangiectasia also known as?

Answer 16

Osler-Weber-Rendu syndrome

Question 17

What are the 4 main diagnostic criteria for hereditary haemorrhagic telangiectasia?

Answer 17

Spontaneous, recurrent epistaxis
Telangiectasia at multiple sites - lips, oral cavity, fingers, nose
Visceral lesions: GI telangiectasia, hepatic AVM< cerebral AVM etc
First degree FHx of HHT

Question 18

Most likely dermatological cancer when on immunosuppressives e.g. following renal transplantation?

Answer 18

SCC

Question 19

What causes vitiligo?

Answer 19

Autoimmune condition causing loss of melanocytes and consequent depigmenattion of the skin

Question 20

What conditions is vitiligo associated with?

Answer 20

Any autoimmune e..g T1DM, addisons, autoimmune thyroid, pernicious anaemia, Alopecia areata

Question 21

Age of onset typical for vitiligo?

Answer 21

20-30

Question 22

Features of vitiligo?

Answer 22

Well-demarcated patches of depigmented skin with peripheries affects the most
Koebner phenomenon may occur

Question 23

Which ethnicity is SLE most common in?

Answer 23

Afro-Caribbean

Question 24

Does SLE rash spare or affect the nasolabial folds?

Answer 24

Spares

Question 25

Answer 25

Tinea capitis (scalp ringworm)

Question 26

Answer 26

Tinea corporis

Question 27

Answer 27

Tinea corporis

Question 28

How do port wine stains change over time?

Answer 28

They darken and become more raised over time They do NOT spontaneously resolve

Question 29

Answer 29

Guttate psoriasis

Question 30

What precipitates Guttate psoriasis?

Answer 30

Strep infection 2-4 weeks before

Question 31

Features of Guttate psoriasis?

Answer 31

Tear-drop scaly papules on trunk and limbs

Question 32

What % of pts with psoriatic arthritis have nail changes?

Answer 32

80-90%

Question 33

Nail changes seen in psoriasis?

Answer 33

Pitting Onycholysis (separation of nail from nail bed) Subungal kyperkeratosis Loss of nail

Question 34

How can spider naevi be differentiated from telangiectasia?

Answer 34

Press on them and watch them fill: Spider naevi fill from the centre, telangiectasia from the edge .

Question 35

What are spider naevi associated with?

Answer 35

Normal physiology Liver disease Pregnancy COCP

Question 36

What is erythema multiforme major?

Answer 36

A more severe form of erythema multiforme which is associated with mucosal involvement Causes target lesions

Question 37

Most common cause of erythema multiforme?

Answer 37

HSV

Question 38

Burns rule of 9s

Answer 38

Question 39

Answer 39

SCC

Question 40

Answer 40

SCC

Question 41

Answer 41

SCC

Question 42

Answer 42

SCC

Question 43

Answer 43

SCC

Question 44

Answer 44

BCC

Question 45

Answer 45

BCC

Question 46

Answer 46

BCC

Question 47

On arm, legs, back and chest Recent change in size, shape and colour

Answer 47

Superficial spreading melanoma

Question 48

On arm, legs, back and chest Recent change in size, shape and colour

Answer 48

Superficial spreading melanoma

Question 49

On sun exposed skin Red or black lump which bleeds or oozes

Answer 49

Nodular melanoma

Question 50

On sun exposed skin Red or black lump which bleeds or oozes

Answer 50

Nodular melanoma

Question 51

On chronically sun-exposed skin in older people

Answer 51

Lentigo maligna melanoma

Question 52

On nails, palms or soles Typically in people with darker skin pigmentation

Answer 52

Acral lentiginous melanoma

Question 53

On nails, palms or soles Typically in people with darker skin pigmentation

Answer 53

Acral lengtiginous melanoma