These neoplastic chief cells were negative for PAS,and diffue moderately positive for CgA. NSE,NF and weakly for Syn,no chief cell immunoreactivity was detected for CK,EMA.

• 免疫组化显示:主细胞弥漫表达CgA、NSE、NF(中等阳性)和Syn(弱阳性),不表达CK、EMA、S-100蛋白、GFAP、HMB45、desm in及CD34,极少数vim entin阳性;