May Be Caused by

 Common

Adhesions

Crohn disease

Gastrointestinal stromal tumor

Hydatid cyst

Intraperitoneal abscess

Large bladder

Mesenteric lymphadenopathy

Mesenteric mass

Mesothelioma

Metastasis

Ovarian cyst

Ovarian tumor

Pancreatic pseudocyst

Peritoneal fluid

Peritonitis

Plexiform neurofibroma

Postoperative state

Primary intestinal neoplasm

Renal mass

Retroperitoneal lymphadenopathy

Retroperitoneal sarcoma

 Uncommon

Amyloidosis

Graft-versus-host disease

Hematoma

Internal hernia

Mesenteric infarction

Mesenteritis

Radiation enteritis

Retractile mesenteritis

Retroperitoneal hernia

Tuberculosis

Weber-Christian disease

Whipple disease