Objective：To investigate the diagnosis and treatment of intestinal malrotation in non-neonatal patients.
Methods：The clinical data of 11 non-neonatal patients with intestinal malrotation were analyzed retrospectively.
Results：Patients presented with vomiting and paroxysmal abdominal pain as the main clinical manifestations. There were no typical symptoms and signs of intestinal malrotation in non-neonatal patients. A diagnosis of intestinal malrotation was made preoperatively in 6 patients by  gastrointestinal contrast study, 2 patients by barium meal and ultrasonography and one patient by barium meal and computerized tomography. The preoperative diagnosis rate was 82%. All patients were proven to have intestinal malrotation intraoperatively and underwent a Ladd procedure. Only one patient had postoperative complication of adhesion of intestine, and recovered after conservative treatment. The others recovered well. All the patients received follow-up of 6-60 months and were asymptomatic, except one case of intestinal obstruction that occurred one year later and recovered by non-operative treatment.
Conclusions：The possibility of intestinal malrotation should be suspected in non-neonatal patients with symptoms of recurrent vomiting and abdominal pain. Combining various imaging assays can enhance the diagnosis rate of intestinal malrotation. Ladd procedure is a safe and reliable treatment of intestinal malrotation with low rates of complications.