1 INTRODUCTION A large proportion of ischemic strokes have an undetermined cause and are considered “cryptogenic”.1 A left atrial septal pouch (LASP) develops due to incomplete fusion of the septa primum and secundum, forming a pocket at the interatrial septum which can be a potential site of blood stasis with resultant thrombus formation.2 LASP has a higher prevalence among patients who present with cryptogenic stroke, but it is rare to visualize a thrombus in the LASP.3 We present a case of...
