Name seven causes of regular thickened small bowel folds.

Hemorrhage into the bowel wall
1. Coagulation defects (e.g., anticoagulant therapy, liver disease, hemophilia)
2. Trauma
3. Ischemia or infarction

Intestinal edema
4. Hypoproteinemia (seen in cirrhosis, Ménétrier’s disease)
5. Ascites
6. Mesenteric lymphatic or venous obstruction
7. Zollinger-Ellison syndrome