This suggested that the recurrent bleeding was due to the azygos lobe.
Tatiana Denega, Suzanne Alkul, Ebtesam Islam, Raed Alalawi 2015, 'Recurrent hemoptysis - a complication associated with an azygos lobe', Southwest Respiratory and Critical Care Chronicleshttp://pulmonarychronicles.com/index.php/pulmonarychronicles/article/view/219. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)