title: Thrombus in the left atrial septal pouch mimicking myxoma.
abstract: A 15 × 13 mm mobile ovoid mass attached via a 15 × 5 mm stalk to the interatrial septum in the left atrium was detected on transesophageal echocardiography and was diagnosed as a myxoma in a 70-year-old woman with chronic atrial fibrillation. She was prescribed anticoagulant therapy with warfarin before elective cardiac surgery and demonstrated no thromboembolic event during a 2.5-month period. Preoperative transesophageal echocardiography showed the disappearance of the intracardiac mass and the presence of a left atrial septal pouch, suggesting that the initial image was a thrombus originating from the left atrial septal pouch.
authors.affiliation: The Department of Cardiology, Hiroshima City Hospital, Hiroshima, Japan.
authors.forename: Keiko
authors.initials: K
authors.lastname: Shimamoto
authors.forename: Takuji
authors.initials: T
authors.lastname: Kawagoe
authors.forename: Kazuoki
authors.initials: K
authors.lastname: Dai
authors.forename: Ichiro
authors.initials: I
authors.lastname: Inoue
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D017548:Echocardiography, Transesophageal; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging*; D006331:Heart Diseases / Q000000981:diagnostic imaging*; D006338:Heart Neoplasms / Q000000981:diagnostic imaging*; D006801:Humans; D009232:Myxoma / Q000000981:diagnostic imaging*; D013927:Thrombosis / Q000000981:diagnostic imaging*; D018615:Ultrasonography, Doppler, Color
keywords: atrial fibrillation; left atrial septal pouch; left atrial thrombus; myxoma