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Résumé Les dermatoses spécifiques de la grossesse incluent la dermatose polymorphe de la grossesse, l’eczéma atopique de la grossesse et la pemphigoïde gestationnelle. La cholestase intra-hépatique gravidique et l’impétigo herpétiforme ne sont pas, stricto sensu, des dermatoses spécifiques de la grossesse. Toutefois, leur connaissance est importante étant donné les risques materno-fœtaux encourus. La dermatose polymorphe gravidique est une dermatose prurigineuse survenant le plus fréquemment au cours du troisième trimestre chez des femmes primipares sans risque maternel ni fœtal. L’eczéma atopique de la grossesse est une entité encore controversée englobant des poussées d’eczéma ou de prurigo avec une association inconstante à un antécédent personnel d’atopie. Enfin, en cas de dermatose prurigineuse de la grossesse, une biopsie cutanée avec immunofluorescence directe ou un dosage des anticorps anti-BPAg1 (180 kD) NC16a sont requis pour éliminer une pemphigoïde gestationnelle. Un dosage des sels biliaires sériques est nécessaire devant un prurit généralisé de la grossesse pour éliminer une cholestase intra-hépatique. Pregnancy-specific dermatoses include polymorphic eruption of pregnancy, atopic eczema of pregnancy, and pemphigoid gestationis. Intrahepatic cholestasis of pregnancy and impetigo herpetiformis are not real pregnancy-specific dermatoses but they are important to know considering the fetal and maternal risks. Polymorphic eruption of pregnancy is a pruritic disease that usually occurs in primiparous women during the last trimester of pregnancy. Atopic eczema of pregnancy is still controversial as an entity covering conditions with eczematous lesions, prurigo, or folliculitis, and inconstantly associated with a personal history of atopy. Skin biopsy with direct immunofluorescence or search for serum anti-BPAg1 (180 kD) NC16a antibodies is mandatory in pruritic dermatoses of pregnancy in order to rule out pemphigoid gestationis. Serum bile salts levels should be tested whenever a generalized pruritus develops during pregnancy in order to rule out intrahepatic cholestasis. [ABSTRACT FROM AUTHOR]

Abstract: Neutrophilic dermatoses are inflammatory disorders where normal neutrophils infiltrate the skin without infection. Sweet''s syndrome, pyoderma gangrenosum, subcorneal pustulosis, erythema elevatum diutinum and a few other conditions are included in the spectrum of neutrophilic dermatoses. In addition to their typical presentation, atypical and overlap forms of these disorders may be observed. According to the location of the neutrophilic infiltrate, three clinical forms are distinguished: superficial (epidermal), en plaques (dermal) and deep (dermal and hypodermal). During the disease course, other tissues can be affected by the same neutrophilic infiltrate. An association with other systemic diseases including malignant blood disorders, inflammatory bowel diseases and autoimmune disorders is frequent. The mechanisms leading to the invasion of the skin by neutrophils remains not completely elucidated. Treatment depends on the intensity and the acute or chronic form of the disease. In acute and severe forms, systemic corticosteroids are first-line therapy, whereas colchicine, dapsone, and even topical corticosteroids could be used in milder presentations of the disease. [Copyright &y& Elsevier]