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REVISION > DERMATOLOGY > Flashcards

DERMATOLOGY Flashcards

1
Q

What are the common complications of seborrheoci dermatitis?

A

Otitis externa and blepharitis

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2
Q

Referral criteria to dermatology for acne?

A

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

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3
Q

Which bacteria contributes to the development of acne?

A

Propionibacterium acnes

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4
Q

What drugs exacerbate psoriasis?

A

BB
Lithium
Antimalarials
NSAIDs
ACEi
Infliximab

Withdrawal of systemic steroids

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5
Q

What is hidradenitis suppurativa?

A

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

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6
Q

Whats the most common site for hidradenitis suppurativa?

A

The armpit

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7
Q

Which drugs can cause erythema multiforme?

A

Penicillin
Sulphanoamides
Carbamazepine
Allopurinol
NSAIDs
COCP
Nevirapine

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8
Q

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

A

6-12 weeks

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9
Q

Features of SCC?

A

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

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10
Q

What virus causes molluscum contagious?

A

Pox virus

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11
Q

Does bullous pemphigoid or pemphigus vulgaris cause mucosal involvement?

A

Pemphigus vulgaris

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12
Q

What is pyoderma gangrenosum?

A

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

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13
Q

Causes of pyoderma gangrenosum?

A

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

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14
Q

How does pyoderma gangrenosum present?

A

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

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15
Q

What is this?

A

Pyoderma gangrenosum

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16
Q

What is hereditary haemorrhagic telangiectasia also known as?

A

Osler-Weber-Rendu syndrome

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17
Q

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

A

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

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18
Q

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

A

SCC

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19
Q

What causes vitiligo?

A

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

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20
Q

What conditions is vitiligo associated with?

A

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

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21
Q

Age of onset typical for vitiligo?

A

20-30

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22
Q

Features of vitiligo?

A

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

23
Q

Which ethnicity is SLE most common in?

A

Afro-Caribbean

24
Q

Does SLE rash spare or affect the nasolabial folds?

A

Spares

25
Q
A

Tinea capitis (scalp ringworm)

26
Q
A

Tinea corporis

27
Q
A

Tinea corporis

28
Q

How do port wine stains change over time?

A

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

29
Q
A

Guttate psoriasis

30
Q

What precipitates Guttate psoriasis?

A

Strep infection 2-4 weeks before

31
Q

Features of Guttate psoriasis?

A

Tear-drop scaly papules on trunk and limbs

32
Q

What % of pts with psoriatic arthritis have nail changes?

A

80-90%

33
Q

Nail changes seen in psoriasis?

A

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

34
Q

How can spider naevi be differentiated from telangiectasia?

A

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

35
Q

What are spider naevi associated with?

A

Normal physiology
Liver disease
Pregnancy
COCP

36
Q

What is erythema multiforme major?

A

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

37
Q

Most common cause of erythema multiforme?

A

HSV

38
Q

Burns rule of 9s

A
39
Q
A

SCC

40
Q
A

SCC

41
Q
A

SCC

42
Q
A

SCC

43
Q
A

SCC

44
Q
A

BCC

45
Q
A

BCC

46
Q
A

BCC

47
Q

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

A

Superficial spreading melanoma

48
Q

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

A

Superficial spreading melanoma

49
Q

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

A

Nodular melanoma

50
Q

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

A

Nodular melanoma

51
Q

On chronically sun-exposed skin in older people

A

Lentigo maligna melanoma

52
Q

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

A

Acral lentiginous melanoma

53
Q

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

A

Acral lengtiginous melanoma

REVISION (25 decks)

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