Isolated Colonic Varices in Pancreatic Adenocarcinoma.

Colonic varices are a rare subtype of ectopic varices and form due to portal hypertension, splenic or portal vein thrombosis, and mesenteric vein obstruction. When present, they are most common in the rectum. We discuss a patient with hematochezia who had isolated right-sided colonic varices related to pancreatic cancer, which is rare. The mass involved the superior mesenteric vein, leading to left-sided portal hypertension and resultant varices. These are difficult to diagnosis because they flatten with insufflation on colonoscopy, so computed tomography or angiography is the gold standard. Treatment options are limited and may require a multidisciplinary approach.