Fever of unknown origin in pregnancy: A case report.

Systemic lupus erythematosus is an autoimmune disease that primarily affects women of reproductive age. In pregnancy, it can lead to maternal and fetal complications. However, diagnosis in pregnancy is challenging since the disease mimics many features associated with other disorders and some complications related to pregnancy. Here we report a 24-year-old woman at 26 weeks gestation who presented with a fever of unknown origin. She developed tachycardia, nausea, fatigue, rigors, and pancytopenia. Once sepsis and other chronic conditions were ruled out, rheumatology was consulted. Following the diagnosis of systemic lupus erythematosus, a combination of hydroxychloroquine, azathioprine, and corticosteroids was started, and the patient showed rapid improvement. She had an uncomplicated delivery at term. This case report highlights a unique presentation of new-onset systemic lupus erythematous in pregnancy. Delay in diagnosis can lead to maternal and fetal complications; however, prompt diagnosis and treatment can improve symptoms and lead to a favorable pregnancy outcome.