Cardiac Metastasis from Ascending Colon Cancer: A Case Report and Review of the Literature

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Cardiac metastasis from colorectal cancer is rare. Such metastasis is usually discovered during autopsy; antemortem diagnosis is rare. A 76-year-old woman in whom we had performed right hemicolectomy for ascending colon cancer was noted to have elevated tumor markers during a follow-up examination 4 months after the surgery. Chest CT indicated a cardiac tumor that was approximately 6 cm in diameter, and we suspected a metastatic cardiac tumor. Subsequently, obstructive jaundice developed as a result of lymph node metastases around an extrahepatic bile duct, and a stent was placed. The patient refused aggressive treatment and was simply followed up clinically. Within 2 months, the cardiac tumor enlarged enough to cause cardiac failure, and death ensued 7 months after the surgery. Autopsy revealed a myocardial tumor, approximately 7 x 5 cm, that extended from the right atrium to the right ventricle. The histopathologic diagnosis was cardiac metastasis from ascending colon cancer. We describe in detail this case of rapidly progressive cardiac metastasis that was discovered after surgical treatment of ascending colon cancer. In searching the medical literature, we found only 14 cases of metastasis of colorectal cancer to the heart. We describe our case in detail and review our experience in light of the available literature.