伪-Methylacyl-CoA racemase (P504S) is a useful marker for the differential diagnosis of solid pseudopapillary neoplasm of the pancreas

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• 作者：Yanying Shen ; MD ; Zhaoliang Wang ; MD ; Jianshan Zhu ; MD ; Yiming Chen ; MD ; Wanqing Gu ; MD ; Qiang Liu ; MD ; ^{liu_qiang2013@yeah.net" class="auth_mail}
• 关键词：伪-Methylacyl-CoA racemase ; Solid pseudopapillary neoplasm ; Pancreatic neuroendocrine tumor ; Acinar cell carcinoma ; Immunohistochemistry
• 刊名：Annals of Diagnostic Pathology
• 出版年：June 2014
• 年：2014
• 卷：18
• 期：3
• 页码：146-150
• 全文大小：965 K

文摘

The differential diagnosis of solid pseudopapillary neoplasm (SPN) from some other nonductal pancreatic tumors may be difficult because of similarities in morphological features. Therefore, immunohistochemical staining is frequently necessary. 伪-Methylacyl-CoA racemase (AMACR) is a diagnostically useful marker for prostatic cancer and papillary renal cell carcinoma. The aim of this study was to investigate AMACR as a new immunohistochemical marker to differentiate SPNs from other nonductal pancreatic tumors. We investigated immunohistochemical staining for AMACR in 26 SPNs, 21 pancreatic neuroendocrine tumors, and 7 acinar cell carcinomas. All cases of SPN showed granular cytoplasmic expression of AMACR, whereas all cases of pancreatic neuroendocrine tumors and acinar cell carcinomas were negative for this immunohistochemical marker. Hence, our findings demonstrate for the first time that AMACR is a useful immunohistochemical marker for the differential diagnosis of SPNs.