Gastric cancer metastasis to the transverse colon requiring differentiation from early-stage colorectal cancer

DOI Web Site 2 References
  • Kato Shun
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Kudo Shinei
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Toyoshima Naoya
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Misawa Masashi
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Kaneshiro Miyuki
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Maeda Yasuharu
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Ishigaki Tomoyuki
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Ichimasa Katsuro
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Nakamura Hiroki
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Ogata Noriyuki
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Kudo Toyoki
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Hisayuki Tomokazu
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Wakamura Kunihiko
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Hayashi Takemasa
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Miyachi Hideyuki
    Digestive Disease Center Showa University, Northern Yokohama Hospital
  • Ishida Humio
    Digestive Disease Center Showa University, Northern Yokohama Hospital

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Other Title
  • 早期大腸癌と鑑別を要した横行結腸胃癌転移の一例

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Abstract

<p>A 60-year-old woman underwent laparoscopic pyloric gastrectomy for advanced gastric cancer. Colonoscopy was performed for post-surgical surveillance thirty months later.</p><p>Colonoscopy showed a 10-mm flat lesion in the transverse colon.</p><p>Endocytoscopy of the lesion revealed glandular ductal openings that were clearly smaller than those in the surrounding normal mucosa. There was a cluster of mildly enlarged nuclei, stained darkly with methylene blue, around the gland duct orifices. The colorectal lesion was resected.</p><p>Immunohistological examination of the resected lesion revealed positivity for MUC5AC in shallow layers, and positivity for MUC6 in deep layers. This is similar to the distribution in gastric mucosa.</p><p>The mucus traits mimicked those of the epithelium of the gastric fossa, and other immunostains were consistent with gastric cancer. The final pathological diagnosis was poorly differentiated adenocarcinoma in the colonic mucosa compatible with metastatic gastric cancer.</p>

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