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volvulus neonatorum
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Volvulus neonatorum is usually due to a defect of normal rotation of the bowel where the caecum remains high, often with a congenital banding passing across the duodenum, which may thus also be obstructed.

A narrow attachment of mesentery suspends the caecum and midgut, which thus are at risk of developing a volvulus.

The volvulus normally develops just below the ampulla of Vater in the duodenum; vomitus is thus bile stained.

If a volvulus develops and is left untreated the whole of the midgut becomes ischaemic and subsequently gangrenous. Prevention of these complications requires treatment in six hours or less from onset.