Atypical multisystem inflammatory syndrome in children presenting with 1-month persistent fever in a 17-month-old: A case report.

Multisystem Inflammatory Syndrome in Children is a serious complication associated with coronavirus disease 2019 that commonly affects individuals under 19 years of age. This condition can present with a wide spectrum of clinical manifestations, some of which may be severe or life-threatening. Management can be challenging due to the variability in clinical presentation and response to therapy. This report describes the case of a toddler with no previously documented severe acute respiratory syndrome coronavirus 2 infection who presented with a 30-day relapsing fever that demonstrated partial response to antipyretics and was associated with gastrointestinal symptoms and a skin rash. Following extensive clinical and laboratory investigations, the patient was diagnosed with multisystem inflammatory syndrome in children and was successfully treated with intravenous immunoglobulin and corticosteroids.