RT Journal Article SR Electronic T1 Large free-floating right atrial mass presenting as intermediate-high risk pulmonary embolism: is reperfusion a better definite strategy? JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e249225 DO 10.1136/bcr-2022-249225 VO 15 IS 5 A1 Mariana Martinho A1 Rita Calé A1 Filipa Ferreira A1 Helder Pereira YR 2022 UL http://casereports.bmj.com/content/15/5/e249225.abstract AB We present a woman in her 60s diagnosed with an intermediate-high risk acute pulmonary embolism and a large, non-serpiginous right atrial (RA) mass. Conservative therapy with unfractionated heparin was started and further assessment of the mass with cardiac MRI suggested thrombus as the most likely diagnosis. Despite 1 month of anticoagulation, mass size remained stable and surgical RA embolectomy and left pulmonary endarterectomy was performed. Histopathology confirmed thrombus. The patient died 10 weeks after surgery.