Retroperitoneal duodenal perforation due to COVID-19: An extremely rare case report.

Introduction and importance: Gastrointestinal (GI) symptoms are the most common extrapulmonary presentation of coronavirus disease 2019 (COVID-19) infection. GI perforation may be an unusual manifestation of COVID-19 infection. Case presentation: We report a 45-year-old man who presented with acute abdominal pain without any respiratory symptoms to our emergency department. Investigations revealed retroperitoneal duodenal perforation and fibrotic changes in lung bases. Laboratory findings demonstrated a positive polymerase chain reaction (PCR) test for COVID-19 and mild leukocytosis. Clinical discussion: COVID-19 related perforation of the retroperitoneal part of the duodenum is extremely rare, and to the best of our knowledge, this is the first reported case. With increasing COVID-19 infection, we might see more cases of GI perforation. In the era of COVID-19 pandemic, any abdominal signs and symptoms should alert the clinicians to consider COVID-19 diagnosis in the differential. Conclusion: Conservative management with close monitoring, antibiotic therapy and serial examinations were completely successful. The patient's general condition improved, and he was discharged on day 7 of hospitalization.