PT - JOURNAL ARTICLE AU - Ursini, Francesco AU - Ruscitti, Piero AU - Addimanda, Olga AU - Foti, Rosario AU - Raimondo, Vincenzo AU - Murdaca, Giuseppe AU - Caira, Virginia AU - Pigatto, Erika AU - Cuomo, Giovanna AU - Lo Gullo, Alberto AU - Cavazzana, Ilaria AU - Campochiaro, Corrado AU - Naclerio, Caterina AU - De Angelis, Rossella AU - Ciaffi, Jacopo AU - Mancarella, Luana AU - Brusi, Veronica AU - Marchetti, Elena AU - Motta, Francesca AU - Visentini, Marcella AU - Lorusso, Sebastiano AU - De Santis, Maria AU - De Luca, Giacomo AU - Massaro, Laura AU - Olivo, Domenico AU - Pellegrini, Roberta AU - Francioso, Francesca AU - Luppino, Jessica AU - Di Cola, Ilenia AU - Foti, Roberta AU - Varcasia, Giuseppe AU - Caso, Francesco AU - Reta, Massimo AU - Dagna, Lorenzo AU - Selmi, Carlo AU - Iagnocco, Annamaria AU - Giacomelli, Roberto AU - Iannone, Florenzo AU - Ferri, Clodoveo TI - Inflammatory rheumatic diseases with onset after SARS-CoV-2 infection or COVID-19 vaccination: a report of 267 cases from the COVID-19 and ASD group AID - 10.1136/rmdopen-2023-003022 DP - 2023 Jun 01 TA - RMD Open PG - e003022 VI - 9 IP - 2 4099 - http://rmdopen.bmj.com/content/9/2/e003022.short 4100 - http://rmdopen.bmj.com/content/9/2/e003022.full SO - RMD Open2023 Jun 01; 9 AB - Objectives To better define the spectrum of new-onset post-COVID-19 and post-COVID-19 vaccine inflammatory rheumatic diseases (IRD) from a large multicentric observational study.Methods Consecutive cases of IRD encountered during a 12-month period and satisfying one of the following inclusion criteria: (a) onset of the rheumatic manifestations within 4 weeks from SARS-CoV-2 infection or (b) onset of the rheumatic manifestations within 4 weeks from the administration of one of the COVID-19 vaccines ws recruited.Results The final analysis cohort comprised 267 patients, of which 122 (45.2%) in the post-COVID-19 and 145 (54.8%) in the postvaccine cohort. Distribution of IRD categories differed between the two cohorts: the post-COVID-19 cohort had a higher percentage of patients classified as having inflammatory joint diseases (IJD, 52.5% vs 37.2%, p=0.013) while the post-vaccine cohort had a higher prevalence of patients classified as polymyalgia rheumatica (PMR, 33.1% vs 21.3%, p=0.032). No differences were detected in the percentage of patients diagnosed with connective tissue diseases (CTD 19.7% vs 20.7%, p=0.837) or vasculitis (6.6% vs 9.0%, p=0.467). Despite the short follow-up period, IJD and PMR patients’ response to first-line therapy was favourable, with both groups achieving a drop in baseline disease activity scores of ~30% and ~70% respectively.Conclusion Our article reports the largest cohort published to date of new-onset IRD following SARS-CoV-2 infection or COVID-19 vaccines. Although causality cannot be ascertained, the spectrum of possible clinical manifestations is broad and includes IJD, PMR, CTD and vasculitis.Data are available upon reasonable request.