Clin Endosc.  2014 Sep;47(5):460-463. 10.5946/ce.2014.47.5.460.

Endoscopic Ultrasound-Guided Sampling of a Metastatic Mucinous Adenocarcinoma Mimicking a Gastric Subepithelial Tumor

• Seo DC
• Lee TH
• Jeen YM
• Kim HG
• Kim EB
• Lee SC

• KMID: 2165381
• DOI: http://doi.org/10.5946/ce.2014.47.5.460

Abstract

Metastatic mucinous adenocarcinoma of appendix origin and mimicking a gastric subepithelial tumor (SET) is very rare. Endoscopic ultrasound (EUS)-guided sampling is a useful diagnostic method for SETs. However, the cytologic findings of metastatic mucinous adenocarcinoma are unfamiliar to many pathologists and gastroenterologists. These findings present a diagnostic challenge because the introduction of gastric epithelium and mucin into the specimen during the procedure can be misleading. This is the first reported experience of an EUS-guided sampling of a gastric SET in a patient with suspected appendiceal tumor, to make the diagnosis of a mucinous adenocarcinoma.

Keyword

Appendix; Endosonography; Biopsy, fine-needle; Adenocarcinoma, mucinous; Stomach

MeSH Terms

Adenocarcinoma, Mucinous*
Appendix
Biopsy, Fine-Needle
Diagnosis
Endosonography
Epithelium
Humans
Mucins
Stomach
Ultrasonography
Mucins

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