biostudies-literatureUnknown49(4)Al Abri QA 60-year-old man was about to undergo minimally invasive aortic valve replacement when transesophageal echocardiography revealed an intracardiac mass on the left atrial free wall. Multimodal images from 5 months earlier had shown no mass. We converted the procedure to open surgery. The excised mass resembled a cardiac myxoma but was determined to be a papillary fibroelastoma. This case illustrates that papillary fibroelastomas can form and grow rapidly, warranting alertness for their unexpected discovery before and during cardiac surgical procedures.Texas Heart Institute journale217725https://www.ebi.ac.uk/biostudies/studies/S-EPMC9427062biostudies-literaturePapillary Fibroelastoma Incidentally Found on Left Atrial Wall During Minimally Invasive Aortic Valve Replacement.PMC9427062Barrios REl Nihum LIAl Abri QMujeeb Zubair MReardon MJRamchandani MfalsePapillary Fibroelastoma Incidentally Found on Left Atrial Wall During Minimally Invasive Aortic Valve Replacement.A 60-year-old man was about to undergo minimally invasive aortic valve replacement when transesophageal echocardiography revealed an intracardiac mass on the left atrial free wall. Multimodal images from 5 months earlier had shown no mass. We converted the procedure to open surgery. The excised mass resembled a cardiac myxoma but was determined to be a papillary fibroelastoma. This case illustrates that papillary fibroelastomas can form and grow rapidly, warranting alertness for their unexpected discovery before and during cardiac surgical procedures.2022-01-01T00:00:00Z2022 Jul2025-04-04T19:23:11.803Z2025-04-04T19:23:11.803ZS-EPMC94270623599434210.14503/THIJ-21-772510.14503/thij-21-7725