The First Case of Reactive Arthritis Associated with SARS-CoV-2-Infection in A 4-Year Old Child

Abstract Background: The novel coronavirus SARS‐CoV‐2 (severe acute respiratory syndrome coronavirus 2) and its associated disease COVID‐19 (Corona Virus Disease 19) has become a worldwide pandemic since its first cases in December 2019 in Wuhan Province in China. In Germany the pandemic started in February 2020.Case presentation: A 4 year old boy was presented and suffered from pain in the right hip. Arthrosonography demonstrated a significant effusion in the involved joint. The extended history revealed a slight but long lasting cold before. Serological findings were inconspicuous except for positive ELISA (Enzyme-linked Immuno Sorbent Assay) - test for SARS-CoV-2. Conclusion: In conclusion we believe that we can report the first case of reactive arthritis associated with SARS-CoV-2 in children.