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Psoriasis (Psoriatic Arthritis (Asymmetric oligoarthritis, Seronegative…
Psoriasis
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Examination
Skin
Locations
- Extensors
- Behind ears
- Scalp
- Umbilicus
- Sites of trauma: Kobner phenomenon
Kobner Phenomenon DDX
- Psoriasis
- Lichen planus
- Viral warts
- Vitiligo
- Sarcoid
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Symmetrical, well-defined salmon-pink plaques
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Nails
- Discolouration
- Pitting
- Onycholysis
- Subungual hyperkeratosis
Onycholysis DDX
- Psoriasis
- Fungal infection
- Trauma
- Thyrotoxicosis
Pitting DDX
- Psoriasis
- Fungal infection
- Lichen planus
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Viva
Hx
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Triggers
- Smoking
- Stress
- Injury
- Drugs: β-B, EtOH
Treatments
- Topical
- Phototherapy
- Systemic
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Subtypes
Guttate
- Drop-like lesions on trunk
- Commoner in children after Strep infection
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Mx
General
MDT: GP, dermatologist
Avoid precipitants: EtOH, β-B, smoking, stress
Topical
Emollients: epaderm, dermol, diprobase
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Systemic
Cytotoxics: ciclosporin, methotrexate
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Differential
- Psoriasis
- Bowen’s Disease
- Lichen planus
- Dermatitis