A case of mixed adenoneuroendocrine carcinoma of the stomach with focal intestinal metaplasia and hypergastrinemia.

Abstract

Among neuroendocrine neoplasms, mixed exocrine and endocrine characteristics with at least 30% of each component are classified into mixed adenoneuroendocrine carcinoma (MANEC), according to the 2010 World Health Organization classification. We experienced a rare case of MANEC of the stomach with focal intestinal metaplasia and hypergastrinemia. A 76-year-old Japanese male was diagnosed as having gastric adenocarcinoma and underwent total gastrectomy. The pathologic diagnosis was MANEC of the stomach accompanied by unusual mucosal atrophy without Helicobacter pylori infection, the characteristics of which were different from both type A and type B atrophic gastritis. The patient has a history of long-term use of a proton pump inhibitor. Additional serum chemistry examination using preoperatively obtained plasma from the patient revealed hypergastrinemia. The mechanism of gastric MANEC carcinogenesis is still unclear, but that might be correlated with unusual intestinal metaplasia and hypergastrinemia in this case.

• Authors: Hayato Yamauchi, Shinji Sakurai, Nobuhiro Nakazawa, Tomonori Yoshida, Yuichi Tabe, Kana Saitoh, Takaharu Fukasawa, Shinsuke Kiriyama, Hiroshi Naitoh, Hiroyuki Kuwano
• Journal: International surgery (Int Surg) Vol. 100 Issue 3 Pg. 562-7 (Mar 2015) ISSN: 2520-2456 [Electronic] Italy
• PMID: 25785345 (Publication Type: Case Reports, Journal Article)

Chemical References

• Biomarkers, Tumor
• Gastrins

Topics

• Adenocarcinoma (blood, pathology)
• Aged
• Biomarkers, Tumor (blood)
• Carcinoma, Neuroendocrine (blood, pathology)
• Gastrins (blood)
• Humans
• Intestines (pathology)
• Male
• Metaplasia
• Neoplasms, Complex and Mixed (blood, pathology)
• Stomach Neoplasms (blood, complications, pathology)