A benign or malignant neoplasm that affects the heart and/or vessels. Representative examples of benign neoplasms include atrial myxoma, hemangioma, and lymphangioma. Representative examples of malignant neoplasms include pericardial malignant mesothelioma and angiosarcoma. The disease is cardiovascular neoplasm (MONDO_0024757, a Monarch Disease Ontology id). Also known as: cardiovascular system neoplasm, cardiovascular system tumor, cardiovascular system tumour, cardiovascular tumor, cardiovascular tumour, neoplasm of cardiovascular system, tumor of cardiovascular system, tumour of cardiovascular system.