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Table 1: Midgut rotation abnormalities. |
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|
Type |
Defect |
Clinical effect |
|
IA |
No rotation |
Midgut volvulus |
|
IIA |
Lack of duodenal rotation, regular colon rotation |
Duodenal band obstruction |
|
IIB |
Reverse rotation of duodenum and colon |
Transverse colon obstruction by the duodenal mesentery |
|
IIC |
Reverse rotation of the duodenum; normal rotated colon |
Right mesenteric pouch (obstruction) |
|
IIIA |
Regular rotation of the duodenum; the colon does not rotate. |
Midgut volvulus |
|
IIIB |
Incomplete fixation of the hepatic angle of the colon |
Ladd’s band obstruction |
|
IIIC |
Incomplete fixation of the cecum and its mesentery |
Cecal volvulus invagination (Waugh’s syndrome) |
|
IIID |
Internal hernias |
Paraduodenal hernia |
|
Taken from: Ballesteros GE et al.3 |
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