Methods: Analysis of clinical manifestation of 21 patients with IAC confirmed by CT, MRI and pathology, their features of image diagnosis and results of their surgical treatment and follow-up studies.

• 方法：对CT或MRI确诊并经手术治疗、病理证实的21例病人的临床表现、影像学特征、诊断和手术效果进行了分析和随访。