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- Yasuyuki Tanaka, Yumi Tokubayashi, Shigehiko Fujii, Toshihiro Kusaka, Shinsuke Shibuya, and Hiroyuki Kokuryu.
- Department of Gastroenterology and Hepatology, Kyoto Katsura Hospital, Japan.
- Intern. Med. 2020 Dec 15; 59 (24): 3165-3169.
AbstractAn 80-year-old woman presented with a 30-mm protruding lesion-like submucosal tumor with a central depression located at the anterior wall of the upper gastric body. The depressed area had a well-demarcated margin, while the other area was covered by a non-neoplastic mucosa. A biopsy specimen revealed neuroendocrine carcinoma. Endoscopic ultrasonography revealed a heterogeneous mass with a clearly distinguished border in the submucosal layer. The mass had two distinct areas adjacent to each other. In addition, a hypoechoic zone was observed on the margin of the mass. Distal gastrectomy was performed. The final diagnosis was a mixed neuroendocrine-non-neuroendocrine neoplasm arising from the heterotopic gastric gland.
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