In pediatric sonography, mesenteric vessel abnormalities can be used as a sign of malrotation or volvulus. This study was aimed at evaluating the diseases associated with mesenteric vessel abnormalities in children, except for rotational anomalies.
From 2017 to 2020, pediatric patients with abdominal complaints were referred for a full abdominal sonogram and were evaluated for mesenteric vascular abnormalities. During this period, 62 children (aged <12 years), with mesenteric vessel abnormalities, were discovered with sonography. They were also examined for associated anomalies and were followed until a final diagnosis was determined.
Mesenteric vessel displacement was reported in 37 patients (60%); in 24 cases, the vein was located to the left of superior mesenteric artery (SMA), and in others (13 Cases), in the anterior position. Abnormal pathways in mesenteric vessels were reported in 33 patients (53%); 18 cases showing a right side turn and 15 cases showing a left side turn. The whirlpool sign was seen in 16 patients (27%). These three patterns of vessel abnormality were associated with disorders such as diaphragmatic hernia, bowel obstruction, and space occupying lesions (masses). The location of the mesenteric abnormality was in the proximal part of mesenteric vessels in 45 cases (72.5%) and in its distal part in 17 cases (27.5%). Malrotation (eight cases), obstruction, and volvulus were the most common causes of a distal abnormality.
Mesenteric vessel abnormalities, noted with sonography, may not be exclusive to the diagnosis of malrotation and midgut volvulus. In this cohort, bowel obstruction, diaphragmatic hernia, and space occupying lesions were the other most common anomalies associated with mesenteric vessel abnormalities. In reviewing one-third of mesenteric vessels, abnormalities were only seen in the distal part of vessels; therefore, a thorough examination is warranted.