Pulmonary artery pseudoaneurysm caused by Streptococcus constellatus 2 3

20 We report a rare case of mycotic pulmonary artery pseudoaneurysm (PAP) secondary 21 to lung abscess due to Streptococcus constellatus. PAP was confirmed by the pathological 22 findings of the pseudoaneurysm, the presence of bacteria, and the microbiological analysis. 23 PAP is uncommon, but it is important to recognize this condition because PAP can lead to fatal 24