Concomitant arterial and venous thrombosis in a patient with adenocarcinoma of the ascending colon: a rare presentation

Colorectal cancer is the third most diagnosed cancer worldwide and it may not show typical symptoms at early stages. Patients with malignancies have an increased risk of, both venous and arterial thrombosis, and sometimes thrombotic events may be the only manifestation. We present a 61-year-old woman with diabetes mellitus and hypertension who developed a sudden onset right-sided headache and blurred vision of her right eye and was diagnosed with cavernous sinus and ophthalmic vein thrombosis. She later experienced an acute myocardial infarction. Further evaluation revealed adenocarcinoma of the ascending colon. Thrombophilia screening was negative. Anticoagulation was initiated with heparin and later switched to warfarin, while she awaited a right hemicolectomy.