Inframesocolic Extension of Neoplasm of Third Duodenum

The third portion of the duodenum lies retroperito-neally below the root of the transverse mesocolon. Extension of a mass arising in this structure is then revealed on barium enema examination by a characteristic elevation of the proximal transverse colon (Fig. 10-33a). While this type of displacement may occur secondary to such conditions as mesenteric cysts or primary ret-

Fig. 10-33. Leiomyosarcoma of third portion of the duodenum with large extramural component.

(a) There is gross elevation and displacement of the proximal transverse colon by a huge mass.

(b) Upper GI series documents the changes of leiomyosarcoma arising in the transverse duodenum, characterized by irregular ulcerations and sinus tracts within a lobulated and serpiginous submucosal tumor. (Reproduced from Meyers.24)

Fig. 10-33. Leiomyosarcoma of third portion of the duodenum with large extramural component.

(a) There is gross elevation and displacement of the proximal transverse colon by a huge mass.

(b) Upper GI series documents the changes of leiomyosarcoma arising in the transverse duodenum, characterized by irregular ulcerations and sinus tracts within a lobulated and serpiginous submucosal tumor. (Reproduced from Meyers.24)

roperitoneal tumors, initial identification of this infra-mesocolic component should lead to careful investigation of the transverse duodenum (Fig. 10-33b).

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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