PMID- 29250290 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 1941-6911 (Print) IS - 1941-6911 (Electronic) IS - 1941-6911 (Linking) VI - 9 IP - 6 DP - 2017 Apr-May TI - Giant Left Atrial Appendage Aneurysm Mimicking Mediastinal Mass and Associated with Incessant Atrial Arrhythmias. PG - 1539 LID - 10.4022/jafib.1539 [doi] LID - 1539 AB - Left atrial appendage aneurysm (LAAA) is a rare entity. Clinical manifestations include arrhythmias and systemic embolization. We show here an example of a large and ectopic LAAA mimicking a mediastinal mass on chest X-ray and presenting with incessant atrial arrhythmias. Subsequent investigations leading to the correct diagnosis are described. FAU - Morin, Joelle AU - Morin J AD - Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, Canada. FAU - Cantin, Luce AU - Cantin L AD - Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, Canada. FAU - Pasian, Sergio AU - Pasian S AD - Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, Canada. FAU - Philippon, Francois AU - Philippon F AD - Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, Canada. FAU - Beaudoin, Jonathan AU - Beaudoin J AD - Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, Canada. LA - eng PT - Case Reports DEP - 20170430 PL - United States TA - J Atr Fibrillation JT - Journal of atrial fibrillation JID - 101514767 PMC - PMC5673340 OTO - NOTNLM OT - Atrial arrhythmias OT - Left atrial appendage OT - Mediastinal Mass EDAT- 2017/12/19 06:00 MHDA- 2017/12/19 06:01 PMCR- 2017/04/30 CRDT- 2017/12/19 06:00 PHST- 2017/01/12 00:00 [received] PHST- 2017/02/19 00:00 [revised] PHST- 2017/03/14 00:00 [accepted] PHST- 2017/12/19 06:00 [entrez] PHST- 2017/12/19 06:00 [pubmed] PHST- 2017/12/19 06:01 [medline] PHST- 2017/04/30 00:00 [pmc-release] AID - 10.4022/jafib.1539 [doi] PST - epublish SO - J Atr Fibrillation. 2017 Apr 30;9(6):1539. doi: 10.4022/jafib.1539. eCollection 2017 Apr-May.