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Metastatic cardiac tumors are cancers that originate in another part of the body and spread to the heart through the bloodstream, lymphatic system, or direct extension. They are far more common than primary heart tumors. Cancers of the lung, breast, kidney, skin (melanoma), and blood-related malignancies such as lymphoma and leukemia are among the most frequent sources of cardiac metastases. Depending on the location within the heart, these tumors may involve the pericardium, myocardium, endocardium, or heart chambers.

Many patients remain symptom-free until the disease progresses. When symptoms develop, they may include chest pain, shortness of breath, palpitations, fatigue, swelling of the legs, or irregular heart rhythms. In severe cases, fluid accumulation around the heart can lead to cardiac tamponade, a life-threatening emergency requiring immediate treatment.

Diagnosis relies on imaging studies such as echocardiography, cardiac MRI, CT scans, and PET scans, along with evaluation of the primary cancer. Treatment primarily focuses on controlling the underlying malignancy using chemotherapy, targeted therapy, immunotherapy, radiation therapy, or surgery when appropriate. Supportive cardiac care is also essential to manage complications and improve quality of life. Early detection and coordinated care between oncologists and cardiologists can enhance symptom control and patient outcomes.