无功能胰岛细胞瘤临床少见 ,由于瘤内常伴有不同程度出血和囊性变 ,因此巨大无功能胰岛细胞瘤常呈囊性表现 ,影像学上易误诊为囊腺瘤 ,本文报告 3例 ,以供参考。例 1　女 ,17岁。因无意中发现左上腹部包块 3天入院 ,无其他症状。过去无胰腺病史 ,无腹部外伤史。胰腺ＣＴ示胰尾 Non-functioning islet cell tumors are rare clinically, because the tumor is often accompanied by varying degrees of hemorrhage and cystic changes, so the giant non-functioning islet cell tumor often shows cystic manifestations, imaging is often misdiagnosed as cystic adenoma, this report has 3 cases. for reference. Example 1 Female, 17 years old. Inadvertently found left upper abdominal mass was admitted to hospital for 3 days without other symptoms. In the past, there was no history of pancreatitis and no history of abdominal trauma. Pancreas CT shows pancreas tail