Contour Distortion of Extrinsic Origin

Tethering of a loop of small bowel by an adhesion. Note the linear impression on the wall.

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Metastatic melanoma forms a large extrinsic mass that distorts and tethers a loop of small bowel.

Tethering of Loop

•           Adhesion

•           Burnt-out endometriosis

•           Desmoplastic process (retractile mesenteritis)

Extrinsic Mass with Tethering

•           Mesenteric metastasis

•           Mesenteric hematoma

•           Carcinoid tumor

•           Intraperitoneal metastasis

•           Endometriosis

•           Interloop abscess

•           Crohn disease