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Mesogastrium

Fig. 8—113. Spread along the fusion fascia of the dorsal mesogastrium in pancreatitis.

The fusion of the dorsal mesogastrium, containing the body and part of the pancreatic tail, to the posterior primitive parietal peritoneum extends from the gastrophrenic ligament, behind the pancreatic body and over the transverse mesocolon, to the greater omentum. The lateral and medial limits are the posterior reflections of the lesser sac.

(a) At the level of the pancreatic tail, spread of fluid is discernible within the left retropancreatic fusion fascia (arrowheads) behind the pancreatic body and tail and in the retrorenal space (arrows), posterior to the superior part of the perirenal space (PS).

(b) At the level of the bare area of the stomach, fluid (F) has spread to the gastrophrenic ligament.

Mesenteric Hemorrhage

Fig. 8—114. Retroperitoneal hemorrhage due to traumatic duodenal rupture.

(a) At the level of the duodenum (D), a large fluid collection in the pancreaticoduodenal compartment, posterior to the mesenteric root (asterisk), surrounds the duodenum (D) and extends into the right retromesenteric plane (arrowheads). Black arrowheads indicate traumatic disrupture of duodenal wall. White arrow = inferior mesenteric vein.

(b) Cranially, at the level of the pancreatic head (P), midline continuation (arrowheads) is present within the cranial extension of the retropancreaticoduodenal fusion fascia.

Fig. 8—114. Retroperitoneal hemorrhage due to traumatic duodenal rupture.

(a) At the level of the duodenum (D), a large fluid collection in the pancreaticoduodenal compartment, posterior to the mesenteric root (asterisk), surrounds the duodenum (D) and extends into the right retromesenteric plane (arrowheads). Black arrowheads indicate traumatic disrupture of duodenal wall. White arrow = inferior mesenteric vein.

(b) Cranially, at the level of the pancreatic head (P), midline continuation (arrowheads) is present within the cranial extension of the retropancreaticoduodenal fusion fascia.

Fig. 8-116. Left-right communication in a patient with pancreatitis.

(a) At the level of the origin of the superior mesenteric artery, only left-sided dorsal fluid (F) is present behind the pancreatic body and tail.

(b) Below this level, fluid (F) within the retropancreaticoduodenal fusion fascia indicates left-right communication (arrows) in the midline. Black asterisk = duodenojejunal junction; P = pancreatic head.

Fig. 8-116. Left-right communication in a patient with pancreatitis.

(a) At the level of the origin of the superior mesenteric artery, only left-sided dorsal fluid (F) is present behind the pancreatic body and tail.

(b) Below this level, fluid (F) within the retropancreaticoduodenal fusion fascia indicates left-right communication (arrows) in the midline. Black asterisk = duodenojejunal junction; P = pancreatic head.

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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