Acute superior mesenteric venous thrombosis with advanced gastric cancer: a case report.

Although the advanced stages of neoplasms have a risk of superior mesenteric venous thrombosis (MVT), an initial clinical diagnosis of MVT is sometimes difficult and it can be treated as a cancer-related pain using NSAIDs and/or opioids.We herein present a case of palliative stage of cancer with acute MVT, which was successfully treated with immediate anticoagulant therapy. We believe this case provides an important clinical lesson, which is that we should remember that MVT is one of the potential causes of abdominal pain with cancer patients and the thrombosis can be easily identified by US and CT.