Intramucosal Gastric Mixed Adenoneuroendocrine Carcinoma Completely Resected with Endoscopic Submucosal Dissection

• Published in: Internal Medicine Vol. 54; no. 8; pp. 917 - 920
• Main Authors: Yamasaki, Yasushi, Nasu, Junichiro, Miura, Kou, Kono, Yoshiyasu, Kanzaki, Hiromitsu, Hori, Keisuke, Tanaka, Takehiro, Kita, Masahide, Tsuzuki, Takao, Matsubara, Minoru, Kawano, Seiji, Kawahara, Yoshiro, Tabata, Masahiro, Okada, Hiroyuki, Yamamoto, Kazuhide
• Format: Journal Article
• Language: English
• Published: Japan The Japanese Society of Internal Medicine 01.01.2015
• Subjects: adenocarcinoma; Adenocarcinoma - pathology; Adenocarcinoma - surgery; Aged; Carcinoma, Neuroendocrine - pathology; Carcinoma, Neuroendocrine - surgery; Dissection; endoscopic submucosal dissection; Gastric Mucosa - pathology; Gastroscopy - methods; Humans; Male; mixed adenoneuroendocrine carcinoma; Stomach Neoplasms - pathology; Stomach Neoplasms - surgery
• ISSN: 0918-2918; 1349-7235
• DOI: 10.2169/internalmedicine.54.3469

Composite tumors in the stomach composed of adenocarcinoma and neuroendocrine carcinoma are rare. We herein report a case of intramucosal gastric mixed adenoneuroendocrine carcinoma (MANEC) that was treated with endoscopic submucosal dissection (ESD). A 77-year-old man who had previously received ESD for early gastric adenocarcinoma underwent esophagogastroduodenoscopy for screening, which showed a depressed lesion on the lesser curvature of the antrum. The tumor was removed en bloc via ESD and pathologically diagnosed as MANEC. The tumor was located within the mucosal layer, and no lymphovascular invasion was evident. Seven months after the ESD procedure, the patient is currently feeling well without recurrence or metastasis.