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无功能胰岛细胞瘤 (ｎｏｎｆｕｎｃｔｉｏｎａｌｉｓｌｅｔｃｅｌｌｔｕｍｏｒ ,ＮＩＴ)发病率小于十万分之一 ,占全部胰岛细胞瘤的 1 5 .0 %～ 36 .3%。由于ＮＩＴ的临床和声像图表现无特异性 ,定性诊断很困难。我们在 1 994年 7月至 1 999年 4月间超声引导下经皮穿刺活检诊断
The incidence of nonfunctional islet cell tumor (NIT) is less than one hundred thousandth, accounting for 15.0% ~ 36.3% of all islet cell tumors. Due to the non-specific clinical and sonographic appearance of NIT, qualitative diagnosis is difficult. We performed ultrasound-guided percutaneous biopsy from July 1994 to April 1999