胰岛Ｂ细胞瘤亦称胰岛素瘤 ,在成人并不少见 ,为器质性低血糖症中较常见病因 ,其发作形式不尽相同 ,器质性特征不常出现 ,极易误诊 ,我们收治 1例误诊为“癫痫”达 4年 6个月之久 ,现报告如下 :1　典型病例李　某 ,男 ,2 0岁 ,因阵发性抽搐、意识丧失 4年 6个月 ,于 2 0 0 2年 Islet B cell tumor, also known as insulinoma, is not uncommon in adults, is the more common cause of organic hypoglycemia, its attack is not the same form, the organic features are not often seen, easily misdiagnosed, we treated 1 case Misdiagnosed as “epilepsy” up to 4 years and 6 months old, are as follows: 1 typical cases Lee, male, 20 years old, due to paroxysmal convulsions, loss of consciousness 4 years and 6 months in 2002