From the case:
Azygos fissure
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/9377/annotated_viewer_json?lang=us"}
Incidental note of an azygos fissure.
Case Discussion
Azygos fissures or lobes are a relatively common incidental anatomical variant seen on chest radiographs.