Extremely rare rapid development of a papillary fibroelastoma on the left ventricular anterior papillary muscle

Papillary fibroelastoma (PFE) is a rare, slow-growing cardiac tumor. We encountered an 80-year-old man with PFE accidentally revealed by transthoracic echocardiography (TTE) to evaluate cardiac function before a non-cardiac operation. A 10-mm mass lesion adhered to the anterior papillary muscle of the left ventricle, which had not been detected with TTE performed nine months before. Emergency cardiac surgery to remove the mass was performed, and the mass was diagnosed as a PFE. The PFE grew to 10 mm in a maximum of 9 months; to our knowledge, this is the fastest growth of PFE in the left ventricle reported to date. Papillary fibroelastoma (PFE) is a rare, slow-growing cardiac tumor. The surgical indication of PFE is sometimes controversial. The rapid growth of PFE might be considered as a criterion for surgery because this might result in the rapid progression of symptoms and complications.