title: [Clinical aspects commented on].
abstract: Psoriasis is a chronic and common disease (prevalence of 1/1000 in France). It is therefore highly probable that it will be encountered by all non-dermatologists in their practice, hence the necessity for them to be able to recognize its principal forms. The clinical presentations of psoriasis are multiple and varying in their severity. In any given patient flare-ups may constantly be similar or change in the course of time. In the vast majority of cases skin lesions are typical, leading to a purely clinical diagnosis without need for additional investigations, and treatment can be instituted. In some case, however, the lesions are atypical and the diagnosis is doubtful. This is where histological skin biopsy can be of considerable help. Finally, other skin lesions may resemble psoriasis and be misleading; here again, histology or some other laboratory examinations will provide the correct diagnosis. In this chapter all these situations are presented be means of photographs accompanied with comments, which illustrate the semeiological and clinical diversity of psoriasis.
authors.affiliation: Clinique des maladies cutanées, hôpital Saint-Louis, Paris.
authors.forename: S
authors.initials: S
authors.lastname: Aractingi
authors.forename: L
authors.initials: L
authors.lastname: Dubertret
mesh_terms: D006801:Humans; D011565:Psoriasis / Q000473:pathology*
vernacular_title: Aspects cliniques commentés.