case_images: PMC11424542_01
case_images: A metastatic hypoechoic mass, measuring 5.1 x 3.4 cm, was present in the left atrium, closely adjacent to the right pulmonary vein.
case_images: fcvm-11-1417906-g001.jpg
case_images: PMC11424542_01_fcvm-11-1417906-g001.jpg
case_images: F1
case_images: Transthoracic echocardiography and organ acoustic imaging identified a 5.1 x 3.4 cm metastatic hypoechoic mass in the left atrium, closely associated with the right pulmonary vein (Figure 1).
case_images: There was a mild enhancement filling defect noted in the right upper pulmonary vein (blue arrow) and the left atrium (white arrow).
case_images: fcvm-11-1417906-g002.jpg
case_images: PMC11424542_01_fcvm-11-1417906-g002.jpg
case_images: F2
case_images: She underwent additional CT contrast imaging of the neck, chest, and upper abdomen, which confirmed the presence of a mass in the left atrium connected to the right upper pulmonary vein (Figure 2).
case_images: Hematoxylin and eosin (H&E) staining on the lung tissue sections reveals nest-like formations of cancer cells, invasive growth patterns, enlarged and deeply stained nuclei, a high nucleus-to-cytoplasm ratio, pronounced atypia of the cancer cells, and stromal fibrosis.
case_images: fcvm-11-1417906-g003.jpg
case_images: PMC11424542_01_fcvm-11-1417906-g003.jpg
case_images: F3
case_images: Microscopic examination revealed cancer cells arranged in nests and clusters, demonstrating infiltrative growth, notable heterogeneity among the cancer cells, and proliferation of interstitial fibrous tissue (Figure 3).