Duodenojejunal Junction Relation to Colon

The intimate relationship of the duodenojejunal junction superiorly to the root of the transverse mesocolon as it extends across the pancreas is of importance in the identification of both locally arising processes and remote colonic pathology.

At this level, the mesocolon is generally long enough so that the transverse colon is considerably anterior. It is then apparent that minor effects on the distal transverse colon on an initial barium enema study may be shown to reflect a process that predominantly involves the ascending duodenum or duodenojejunal junction (Figs. 10-35 and 10-36).

Transvers Colon With Gas Within The Wall

Fig. 10—34. Acute pancreatitis.

The radiologic finding of associated ileus of the transverse colon and of the descending duodenum (shown by stasis of barium within the dilated loop, here superimposed upon the gas-distended transverse colon) is diagnostic of this condition.

Fig. 10—34. Acute pancreatitis.

The radiologic finding of associated ileus of the transverse colon and of the descending duodenum (shown by stasis of barium within the dilated loop, here superimposed upon the gas-distended transverse colon) is diagnostic of this condition.

Superior Parietal Junction

Fig. 10—35. Cyst of the posterior parietal peritoneum below the root of the mesocolon.

(a) Mild extrinsic pressure effect on the superior contour of the transverse colon (arrows).

(b) Gross medial displacement of the fourth portion of the duodenum and duodenojejunal junction, with pressure on the greater curvature of the gastric antrum.

(Reproduced from Meyers and Whalen.1)

Fig. 10—35. Cyst of the posterior parietal peritoneum below the root of the mesocolon.

(a) Mild extrinsic pressure effect on the superior contour of the transverse colon (arrows).

(b) Gross medial displacement of the fourth portion of the duodenum and duodenojejunal junction, with pressure on the greater curvature of the gastric antrum.

(Reproduced from Meyers and Whalen.1)

Verkalkte Bauchaorta

Fig. 10—36. Large calcified aneurysm of the abdominal aorta (arrows).

(a) There is mild pressure on the transverse colon, but (b) marked medial displacement of the ascending duodenum and superior displacement of the duodenojejunal junction. (Reproduced from Meyers and Whalen.1)

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