[Urticaria and angioedema caused by mastocytosis].

Mastocytosis in children are very polymorphic, most often remaining isolated, without an associated visceral lesion. Beside the phenomenon of "urtication" characteristic, papulo-nodular lesions of urticaria and angio-oedema during the mastocytosis are rarely met. In contrast, congestive signs with pruritus, dermographism, congestive erythema and general signs are frequent.