diagnosis of psoriasis - general principles
Last edited 08/2019
- 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