Conclusion: Sonography has a higher accuracy in the diagnosis of retrocecal appendicitis.For the patient with atypical appendicitis symptom, sonography should be made.

• 结论：超声对盲肠后位阑尾炎有较高的检出率，对于症状不典型，临床疑诊阑尾炎的患者应及时行超声检查。