Therapy resistant urticaria as a long-term symptom of an incomplete Schnitzler syndrome.

"Declarations Ethics approval and consent to participateThe patient gave full informed consent on the use of his medical history and all utilized pictures for this case report. Consent for publicationAll authors consent the publication of the manuscript. Competing interestsThe authors have no conflicts of interest to declare that are relevant to the content of this article. Outside this topic: Sabine Altrichter has conducted studies for/was advisor for/was speaker for AstraZeneca, Allakos, ALK, CSLBehring, LeoPharma, Moxie, Novartis, Sanofi, Takeda, Thermofisher. Wolfram Hoetzenecker has conducted studies for/was advisor for/was speaker for Novartis, Eli Lilly, Bencard, ALK, Leo Pharma, Kyowa Kirin, Takeda, Sanofi-Aventis and AbbVie. The other authors state no conflict of interests. Competing interests The authors have no conflicts of interest to declare that are relevant to the content of this article. Outside this topic: Sabine Altrichter has conducted studies for/was advisor for/was speaker for AstraZeneca, Allakos, ALK, CSLBehring, LeoPharma, Moxie, Novartis, Sanofi, Takeda, Thermofisher. Wolfram Hoetzenecker has conducted studies for/was advisor for/was speaker for Novartis, Eli Lilly, Bencard, ALK, Leo Pharma, Kyowa Kirin, Takeda, Sanofi-Aventis and AbbVie. The other authors state no conflict of interests."

"Funding No funding was received for the study and the preparation of this manuscript."