• Internal medicine · Jan 2021

    Case Reports

    Collision Tumors of Gastric Adenocarcinoma and Mucosa-associated Lymphoid Tissue Lymphoma.

    • Kenichi Kobayashi, Kazuhiro Furukawa, Eri Ishikawa, Ayako Mitsuma, Kohei Funasaka, Naomi Kakushima, Satoshi Furune, Nobuhito Ito, Hirotaka Wada, Takashi Hirose, Koichi Muroi, Tomohiko Suzuki, Takahiro Suzuki, Emiko Hida, Keiko Hirai, Hiroyuki Shibata, Toshinari Koya, Masanao Nakamura, Hiroki Kawashima, Ryoji Miyahara, and Mitsuhiro Fujishiro.
    • Department of Gastroenterology, Tokai Central Hospital, Japan.
    • Intern. Med. 2021 Jan 1; 60 (15): 2419-2424.

    AbstractA 65-year-old woman with a history of treatment for splenic marginal zone B-cell lymphoma and gastric mucosa-associated lymphoid tissue (MALT) lymphoma underwent esophagogastroduodenoscopy. A reddish elevated lesion was found in the fundus of the stomach. On image-enhanced endoscopy, several findings, such as glandular structures of varying sizes suggesting well-differentiated adenocarcinoma, pruned blood vessels, and dilated blood vessels in deeper mucosa suggesting MALT lymphoma, were observed. The final pathological diagnosis after surgical resection was collision tumors of well-differentiated adenocarcinoma and MALT lymphoma. The features of both tumors could be observed simultaneously with image-enhanced endoscopy.

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