Bronchoperitoneal Fistula Secondary to Right Lower Lobe Pneumonia.

In this case report, we report a case of bronchoperitoneal fistula secondary to pneumonia in a 25-year-old male patient who presented with pain abdomen and fever with provisional diagnosis of duodenal perforation and air under right diaphragm in chest radiograph. Diagnosis of bronchoperitoneal fistula was made on computed tomographic findings, which showed consolidation and small cavity in the right lower lung lobe communicating with a loculated air pocket in the right subphrenic space through a right hemidiaphragmatic defect. Knowledge of this entity is important as fistula can be overlooked and can lead to mismanagement. Key Messages Bronchoperitoneal fistula is rare entity that can be overlooked in imaging and can lead to misinterpretation and mismanagement as hollow viscus perforation.