PMC7528050_01
Perioperative imaging findings.. (a) Surgical view of spindle cell sarcoma in left atrium (Tumor shown as white arrows).. (b) PET showed residual disease in the heart but no distant metastasis (Residual tumor shown as red arrows).. (c) Carbon-ion radiotherapy.
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During surgery, the tumor was found to have an irregular LA surface of 30 x 30 mm, which invaded the left inferior pulmonary vein from the atrial septum (Fig. 1a).
CT images. The tumor gradually grew (Tumor shown as red arrows).. (a) Preoperative. (b) 1 year after surgery. (c) 2 year after surgery. (d) 4.5 year after surgery.
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CT showed tumor expansion (Fig. 2a). At 2 years after surgery, PET and CT showed that the LA tumor within the irradiation field had grown in size, with increased FDG accumulation compared with the previous examination (Fig. 2b). Two months later, the tumor had grown to 55 x 33 mm (Fig. 2c), although the mitral stenosis (mean pressure gradient: 10 mmHg) remained the same (Fig. 1b).