The origin of p40-negative and CDX2-positive primary squamous cell carcinoma of the stomach: case report View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-12

AUTHORS

Yukinori Yamagata, Kazuyuki Saito, Shinichi Ban, Akiko Fujii, Masatoshi Oya

ABSTRACT

BACKGROUND: Primary gastric squamous cell carcinoma (SCC) is a very rare disease. The origin of this tumor remains unclear, although there are some hypotheses. A 60-year-old man consulted a previous physician complaining of upper abdominal pain. Esophagogastroduodenoscopy revealed type 2 gastric cancer, and the patient was referred to our hospital. After close examination, the patient was diagnosed as cStage IIA gastric adenocarcinoma, and distal gastrectomy was performed. Histochemical studies showed typical findings of SCC, and the tumor was surrounded by intestinal metaplasia. Immunohistochemical examination was positive for cytokeratin (CK) 5/6 and caudal-type homeobox protein 2 (CDX2) and negative for p63/p40. CONCLUSION: The results of immunostaining for CK5/6 supported that this tumor was SCC, but the question why p63/p40 were negative and CDX2 was positive still remained. Concerning about the origin of p63/p40 and CDX2, it was suggested that the tumor cells were not derived from ectopic squamous epithelium but from intestinal metaplasia. And tumor cells looked like homogeneous and squamous metaplasia was not observed. These findings supported the idea that these tumor cells arose from stem cells in the intestinal metaplasia of the stomach. More... »

PAGES

53

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s12957-019-1594-8

DOI

http://dx.doi.org/10.1186/s12957-019-1594-8

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112876631

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30890174


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