Persistent descending mesocolon
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Persistent descending mesocolon is defined as the failure of fusion of the mesentery of the descending colon with the lateral and posterior parietal peritoneum 1.
Gross anatomy
Persistent descending mesocolon is a rare congenital anomaly, in which the primitive dorsal mesocolon does not fuse with the parietal peritoneum.
Radiographic features
CT and barium studies are the most helpful imaging modalities for the diagnosis. The typical finding is the medializationmedialisation and oblique course of the descending colon, with small bowel loops seen lateral to it ref.
Clinical presentationsignificance
It is asymptomatic in the majority of cases, but it has clinical significance as it may cause intestinal obstruction, volvulus, intussusception or internal hernia 2,3.
-<p><strong>Persistent descending mesocolon</strong> is defined as the failure of fusion of the <a href="/articles/mesentery">mesentery</a> of the <a href="/articles/descending-colon">descending colon</a> with the lateral and posterior parietal <a href="/articles/peritoneum">peritoneum</a> <sup>1.</sup></p><h4>Gross anatomy</h4><p>Persistent descending mesocolon is a rare congenital anomaly, in which the primitive dorsal mesocolon does not fuse with the parietal peritoneum.</p><h4>Radiographic features<br> </h4><p>CT and barium studies are the most helpful imaging modalities for the diagnosis. The typical finding is the medialization and oblique course of the descending colon, with small bowel loops seen lateral to it <sup>ref</sup>.</p><p> </p><h4>Clinical presentation</h4><p>It is asymptomatic in the majority of cases, but it has clinical significance as it may cause <a href="/articles/bowel-obstruction">intestinal obstruction</a>, <a href="/articles/intestinal-volvulus">volvulus</a>, <a href="/articles/intussusception">intussusception</a> or <a href="/articles/internal-hernia">internal hernia</a> <sup>2,3</sup>.</p>- +<p><strong>Persistent descending mesocolon</strong> is defined as the failure of fusion of the <a href="/articles/mesentery">mesentery</a> of the <a href="/articles/descending-colon">descending colon</a> with the lateral and posterior parietal <a href="/articles/peritoneum">peritoneum</a> <sup>1.</sup></p><h4>Gross anatomy</h4><p>Persistent descending mesocolon is a rare congenital anomaly, in which the primitive dorsal mesocolon does not fuse with the parietal peritoneum.</p><h4>Radiographic features</h4><p>CT and barium studies are the most helpful imaging modalities for the diagnosis. The typical finding is the medialisation and oblique course of the descending colon, with small bowel loops seen lateral to it <sup>ref</sup>.</p><h4>Clinical significance</h4><p>It is asymptomatic in the majority of cases, but it has clinical significance as it may cause <a href="/articles/bowel-obstruction">intestinal obstruction</a>, <a href="/articles/intestinal-volvulus">volvulus</a>, <a href="/articles/intussusception">intussusception</a> or <a href="/articles/internal-hernia">internal hernia</a> <sup>2,3</sup>.</p>
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