| Theme |
Magnifying Endoscopic Diagnosis of Gastro‒intestinal Carcinomas |
| Title |
Diagnosis of Gastric Non-epithelial Neoplasia with magnifying Endoscopy |
| Author |
Akira Maekawa |
Department of Gastrointestinal Oncology, Osaka International Cancer Institute |
| Author |
Noriya Uedo |
Department of Gastrointestinal Oncology, Osaka International Cancer Institute / Corresponding Author uedou-no@mc.pref.osaka.jp |
| Author |
Hiroko Nakahira |
Department of Gastrointestinal Oncology, Osaka International Cancer Institute |
| Author |
Yoji Takeuchi |
Department of Gastrointestinal Oncology, Osaka International Cancer Institute |
| Author |
Koji Higashino |
Department of Gastrointestinal Oncology, Osaka International Cancer Institute |
| Author |
Ryu Ishihara |
Department of Gastrointestinal Oncology, Osaka International Cancer Institute |
| [ Summary ] |
Magnifying endoscopy with narrow band imaging (NBI‒ME) is useful in making a diagnosis of gastric epithelial neoplasia. As most gastric non‒epithelial neoplasias are covered with normal mucosa, thus it is impossible to make a correct diagnosis by using NBI‒ME. In some cases of malignant lymphoma, disappearance of the surface structure and presence of an irregular vascular pattern are useful signs for diagnosis. The demarcation line of malignant lymphoma is less distinct compared with that of gastric cancer. Large vessels resembling a tree trunk with long branches (called a "tree-like appearance") predict mucosa‒associated lymphoid tissue (MALT) lymphoma. In gastric carcinoid tumors, extended surface structure and dilated vessels are frequently seen on the surface. |