Giant superior vena cava (SVC) aneurysm in obstructive supracardiac total anomalous venous connection (TAPVC) is rare, and there has not been a giant SVC aneurysm reported in non-obstructive TAPVC. Here we reported a 29‐year‐old female with non-obstructive TAPVC and a giant SVC aneurysm. Routine TAPVC correction and partial venoctomy were done, considering that such a giant aneurysm in a non-obstructive venous arch might have its histological etiology and higher risk of thrombosis and/or rupture.

Cor triatriatum is a rare congenital heart malformation with different natural history which depends on the size of the aperture in the partition between the proximal and distal chambers. In classic cor triatriatum all pulmonary veins return to proximal chamber (accessory left atrium, aLA), but this case we reported with left upper pulmonary vein returned to distal chamber (true left atrium, tLA). The partition had one 5mm aperture that allowed this patient grown up to adulthood without any symptoms, but finally resorted to hospital with symptomatic atrial flutter and detected this cor triatriatum accidentally. Atrial flutter may be a long-term complication of cor triatriatum during its natural history, surgical correction of cor triatriatum and radiofrequency ablation for atrial flutter is recommended once diagnosed.

Hemangioma in heart chambers is rare, most cases with heat hemangioma without symptom. The case we presented was an extremely left ventricle hemangioma with hest pain and palpitation after exercise. The tumor was resected under cardiopulmonary bypass, histopathological analysis concluded a benign vascular tumor. Examination of the tumor revealed vascular proliferation and mucoid degeneration in matrix. Immunohistochemistry showed strong positive staining with antibodies against CD31 and CD34, which supported the vascular origin of this tumor.