Micrograph of an atrial myxoma, the most common<unk> . Benign The most common<unk>  is the myxoma. In surgical series, the myxoma makes up as much as 77% of all<unk> . Less common<unk>  of the heart include: * Lipoma * Rhabdomyoma * Cystic<unk> of the atrioventricular nodal region. * Lipomas and Lipomatous Hypertrophy of the interatrial septum: the second most frequent<unk>  cardiac<unk>  usually located in the subepicardium * Papillary Fibroelastoma * Fibroma * Teratoma Malignant About 20 percent of<unk>  are malignant in nature. Malignant<unk>  of the heart include rhabdomyosarcomas, angiosarcomas, myxosarcomas, fibrosarcomas, leiomyosarcomas, reticulum cell sarcomas, desmoplastic small round cell<unk>  and liposarcomas. Angiosarcoma is the most common<unk>  cardiac malignancy. It tends to occur in the right atrium and involve the pericardium. Cardiac sarcomas may occur at any age but are more commonly seen in individuals in their 20s to 40s. They occur equally in males and females. Rhabdomyosarcoma is the most common<unk>  cardiac malignancy in children and is more likely than other<unk>  cardiac sarcomas to involve the valves. Valvular A subset of the<unk>  are<unk>  that are found on the valves of the heart.<unk>  that affect the valves of the heart are found in an equal distribution among the four heart valves. The vast majority of these are papillary fibroelastomas.<unk><unk>  of the valves of the heart are more likely to occur in males. While most<unk><unk>  of the valves of the heart are not malignant, they are more likely to have symptoms related to the valve, including neurologic symptoms and (in a few cases) sudden cardiac death.
Primary tumors of the heart
Ectopic pacemaker
Autoimmune heart disease
Ventricular aneurysm
Sudden arrhythmic death syndrome
Cardiac myxoma
Coronary artery ectasia
Pacemaker failure