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YR3: Dermatology > Psoriasis > Flashcards

Psoriasis Flashcards

1
Q

What is psoriasis?

A

AI condition characterised by hyper proliferation of keratinocytes

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2
Q

What is the aetiology of psoriasis?

A

UNKNOWN

Genetic, environmental factors + drugs are implicated

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3
Q

Give a risk factor for guttate psoriasis

A

Streptococcal sore throat

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4
Q

Describe the epidemiology of psoriasis

A

Affects 1-2% of population

Peak age of onset: 20 yrs

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5
Q

List symptoms of psoriasis

A

Itching + occasionally tender skin

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6
Q

Describe plaque psoriasis

A

Symmetrical, well-demarcated erythematous plaques with silvery/purple scales
Extensor surfaces (knee, elbows, scalp, sacrum)
Dry, flaky skin

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7
Q

What are the 5 sub-types of psoriasis?

A 
Plaque
Guttate
Pustular/ Palmo-plantar
Flexural
Erythrodermic: systemic body redness + inflammation
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8
Q

Give risk factors for palmoplantar psoriasis

A

Smoking
Middle-aged women
AI thyroid disease

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9
Q

Give risk factors for generalised pustular psoriasis

A

Hypoparathyroidism

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10
Q

Give 2 general risk factors for psoriasis

A

PMH of psoriasis

FH of psoriasis

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11
Q

List 3 triggers of psoriasis

A

Stress
Smoking
Alcohol

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12
Q

What is psoriatic arthritis?

A

Symmetrical poly arthritis

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13
Q

Describe guttate psoriasis

A

small drop-like lesions over trunk + limbs

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14
Q

Describe pustular psoriasis

A

erythematous plaques with pustules on palms + soles

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15
Q

Describe flexural psoriasis

A

less scaly plaques in axilla, groins, perianal + genital

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16
Q

List 3 nail signs that may present in psoriasis

A

Pitting
Onycholysis
Subungual hyperkeratosis

17
Q

What 2 phenomenon may occur in psoriasis?

A

Auspitz: Pinpoint bleeding with removing scales
Koebner: New skin lesions on previously unaffected skin secondary to trauma

18
Q

What investigations are performed in psoriasis?

A

Most pts DO NOT need investigations
Nail clipping analysis for onychomycosis (fungal infection)
Joint involvement analysed by checking for rheumatoid factor and radiographs

19
Q

What investigations may be performed in psoriasis?

A

Most pts DONT need ix
Nail clipping analysis for onychomycosis (fungal infection)
Joint involvement analysed by checking for rheumatoid factor + radiographs

20
Q

What investigations may be performed in flexural psoriasis ?

A

Skin swabs to exclude candidiasis

21
Q

What investigations may be performed in flexural psoriasis ?

A

Skin swabs to exclude candidiasis

22
Q

Give 4 differentials for onycholysis

A

Psoriasis
Hyperthyroidism
Fungal infection
Trauma

YR3: Dermatology (12 decks)

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