Chronic superior mesenteric venous thrombosis revealed by diabetic ketonuria and bacteremia.

We report a patient with superior mesenteric venous thrombosis presenting as diabetic ketonuria and bacteremia. The patient was a 65-year-old man with a history of diabetes mellitus, and was admitted to our hospital due to high fever. Tests revealed diabetic ketonuria and Bacteroides fragilis bacteremia. Abdominal computed tomographic scan and Doppler sonography revealed an old thrombus in the superior mesenteric vein with good flow through collateral vessels, causing the patient to have an absence of abdominal symptoms. There was no evidence of hereditary thrombophilia. The thrombus was secondary to a combination of comorbidities, including dehydration, hyperosmolarity, and diabetes mellitus.