CASE REPORTOccurrence of adult-onset Still’s disease aftercoronavirus disease 2019 BNT162B2 vaccination in a patient with ulcerative colitisTakahiro Kobayashi1, MD | Kenichi Hashimoto1, MD, PhD | Yasuyoshi Kusanagi2, MD | Yuji Tanaka1, MD, PhD1Department of General Medicine, National Defense Medical College, Tokorozawa, Saitama359-8513, Japan2Department of Internal Medicine, Division of Hematology and Rheumatology, National Defense Medical College, Tokorozawa, 359-8513 Saitama, JapanCorrespondence: Kenichi Hashimoto, Department of General Medicine, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan.Tel: +81-429-95-1211 (ext. 3633); Fax: +81-429-91-1238Email:hashimoto.kenich2@gmail.comDATA AVAILABILITY STATEMENTNot applicable.FUNDING STATEMENTThis work was supported by the Fukuda Foundation for Medical Technology (2019).CONFLICT OF INTEREST DISCLOSUREThe authors report no conflict of interest.ETHICS APPROVAL STATEMENTThe study was approved by the Competent Authorities and Ethics Committees of National Defense Medical College (approval no. 4609). Written informed consent was obtained from all patients.PATIENT CONSENT STATEMENTPublished with written consent of the patient.PERMISSION TO REPRODUCE MATERIAL FROM OTHER SOURCESNot applicableCLINICAL TRIAL REGISTRATIONNot applicable