Abstract
Right atrial myxomas have rarely been reported. The authors describe a giant hourglass-shaped atrial myxoma consisting of three lobes; one of them had protruded into the right ventricle. Its size was 18×7×5 cm and weight was 170 g. The authors were not able to find another myxoma as big as this one in the literature, so they are reporting it. They review and discuss the literature involving the subject.