[Left atrial giant myxoma incidentally discovered during endoscopic ultrasonography; report of a case].

: A 49-year-old female patient with a symptom of dysphagia underwent endoscopic ultrasonography (EUS) of the upper gastrointestinal tract, which incidentally revealed a tumor compressing the esophagus from outside. Transthoracic echocardiography performed after EUS showed a giant tumor in the left atrium. The tumor, measuring 75×68×43 mm, weighing 105 g was successfully removed, and pathologically diagnosed as myxoma. Her symptom disappeared completely. When performing clinical studies, it is important to pay every attention not to miss any abnormal findings beyond the scope of targeted areas. We also mentioned an ambiguity of the term," giant" regarding the size and weight of myxoma.