Dynamic changing mass behind the left atrium.
Buss
S
S
Katus
H A
HA
Mereles
D
D
D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D005260:Female; D006325:Heart Atria; D006338:Heart Neoplasms / Q000000981:diagnostic imaging*; D006551:Hernia, Hiatal / Q000000981:diagnostic imaging*; D006801:Humans; D014463:Ultrasonography