I. Introduction Cardiac tumors are a rare disease and are classified as benign, malignant and metastatic tumors. The most common of the benign tumors is mucinous tumor. 7% of the mucinous tumors are an autosomal dominant disorder called Carney complex, which manifests as cardiac mucinous tumors, skin lesions, tumors of the endocrine system or hyperactivity. Papillary elastotic fibromas are the most common valvular tumors, mostly located in the aortic or mitral valve. Transverse myxoma and fibroma are common tumors in childhood. Transverse myxoma is often multiple and may decrease in size or recede with age. Other benign tumors include lipomas, hemangiomas, teratomas, paragangliomas, and cardiac cysts. The most common of the malignant tumors is sarcoma. Other malignant tumors include pericardial mesothelioma and lymphoma, and patients with pericardial mesothelioma most often have a history of asbestos exposure. The sources of metastatic tumors are commonly lung cancer, breast cancer, soft tissue sarcoma, kidney cancer, malignant melanoma, hematologic disease and lymphoma, etc. Clinical manifestations Clinical manifestations include systemic manifestations, embolic manifestations and cardiac manifestations. Systemic manifestations include fever, general malaise, arthralgia, skin rash, pestle finger, etc. Embolism is caused by the dislodgement of surface debris or thrombus of cardiac tumor, usually cerebral artery embolism or limb artery embolism. Cardiac manifestations are usually caused by tumor compression or blood flow obstruction, which may manifest as palpitation, shortness of breath, chest tightness, chest pain and syncope, etc. The diagnosis of cardiac tumor should firstly exclude thrombus and superfluous organism, and then exclude whether it is metastatic tumor. Most of the primary tumors are benign, and mucinous tumors are considered firstly; tumors in the valve area are considered firstly as papillary elastoma, and tumors in childhood are considered firstly as rhabdomyosarcoma and fibroma; most of the malignant tumors are sarcomas. Most of the malignant tumors are sarcomas. Frequent diagnostic methods include cardiac ultrasound, CT and cardiac magnetic resonance imaging (MRI). Treatment, prognosis and follow-up Most benign tumors can be completely resected with good prognosis; malignant tumors can be partially or completely resected with poor prognosis, and some patients can be treated with radiotherapy and chemotherapy. After surgery of benign tumor, it is usually necessary to review in 3 months, 6 months and a year after surgery, and then once a year afterwards; after surgery of malignant tumor or metastatic tumor, it is recommended to review once every 3 months.