case_images: PMC10899463_01
case_images: Preoperative echocardiography and enhanced cardiac CT scan images. (A-B) Transthoracic echocardiography showed an echoless tumor measuring 4.6 x 4.4 cm in the left atrium, with clear boundary, a small base attached to the atrial septum, and no blood signal in the tumor. (C-D) Enhanced cardiac CT scan in transverse plane (C) and coronal plane (D) showed a giant tumor in the left atrium with heterogeneous density after enhancement.
case_images: fcvm-11-1323890-g001.jpg
case_images: PMC10899463_01_fcvm-11-1323890-g001.jpg
case_images: F1
case_images: TTE demonstrated an almost echoless mass measuring 4.6 x 4.4 cm with well-defined margins in the left atrium, which was attached to the atrial septum with a narrow base (Figures 1A,B). TEE showed a large cystic mass in the left atrium that protruding into the mitral valve during diastole, causing mild mitral stenosis (Supplementary Video S1). A cardiac CT scan displayed a giant tumor located in the left atrium with heterogeneous density following enhancement, suggesting the possibility of a myxoma (Figures 1C,D).
case_images: Intraoperative and pathological images. (A) Intraoperative view revealed a parenchymal blood-filled cyst with smooth surface attached to the atrial septum with a pedicle. (B) Pathological examination of the cyst (hematoxylin and eosin stain, x4) showed spindle cells with eosinophilic cytoplasm surrounded by mucoid matrix.
case_images: fcvm-11-1323890-g002.jpg
case_images: PMC10899463_01_fcvm-11-1323890-g002.jpg
case_images: F2
case_images: During the surgery, a giant parenchymal cyst was found in the left atrium with a pedicle attached to the atrial septum, which was intact (Figure 2A). The tumor cells were arranged in a linear pattern and oriented towards the blood vessels, with no cytological atypia present (Figure 2B).