Diagnosis of psoriasis - general principles
- this is based on the clinical features and usually presents no diagnostic difficulty
- only rarely is confirmatory biopsy required
- the distribution, colour and typical silvery scaling of the lesion in chronic plaque psoriasis are characteristic
- solitary lesions may occasionally be mistaken for epitheliomata; flexural involvement may be confused with intertrigo caused by candida
- scalp lesions may be mistaken for seborrhoeic dermatitis
- nail lesions result in deformity that resembles that caused by a fungal infection
Reference
- Psoriasis: The assessment and management of psoriasis. NICE Clinical Guideline (October 2012 - last updated September 2017)
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