case_images: PMC11208670_01
case_images: Ultrasonography shows a left atrial isoechoic mass ( ).
case_images: fcvm-11-1398311-g001.jpg
case_images: PMC11208670_01_fcvm-11-1398311-g001.jpg
case_images: F1
case_images: Echocardiography revealed echo groups in the left atrium, obstruction and mild regurgitation of the mitral valve, moderate regurgitation of the tricuspid valve, and mild regurgitation of the valve (Figure 1).
case_images: A microcystic or gridded arrangement, similar to adenomatoid tumors, H&E x100.
case_images: fcvm-11-1398311-g002.jpg
case_images: PMC11208670_01_fcvm-11-1398311-g002.jpg
case_images: F2
case_images: Glandular ducts and microcystic structures were seen (Figure 2).
case_images: Epithelioid cells are vacuolar or cubic, with acidophilic and abundant cytoplasm and large deeply stained nuclei; H&E x200.
case_images: fcvm-11-1398311-g003.jpg
case_images: PMC11208670_01_fcvm-11-1398311-g003.jpg
case_images: F3
case_images: The karyoplasmic index was high, and the nucleolus was clearly visible (Figure 3).
case_images: Calretinin is positive for diffuse cell membrane; EnVision, x200.
case_images: fcvm-11-1398311-g004.jpg
case_images: PMC11208670_01_fcvm-11-1398311-g004.jpg
case_images: F4
case_images: Immunohistochemistry showed calretinin (Figure 4), and CK5/6, CK, D2-40, WT-1, and vimentin were positively expressed.