A 79-year-old female with no relevant past medical history was admitted in our emergency department for dyspnea on minimal exertion and chest discomfort over 2 weeks. Blood gas analysis showed severe hypoxemia and hypocapnia. Troponin was slightly positive. Despite a negative D-dimer assay, contrast-enhanced chest CT was performed to exclude pulmonary embolism. It showed a large filling defect centered in the pulmonary valve plane (Panels A and B). Bedside transthoracic echocardiogram showed a large echodense mass, apparently mobile, extending across […]