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

Author: Dae Chul SEO ¹ ; Tae Hee LEE ; Yoon Mi JEEN ; Hyun Gun KIM ; Eui Bae KIM ; Sang Cheol LEE
Author Information

1. Department of Internal Medicine, Digestive Disease Center, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
Publication Type:Case Report
Keywords: Appendix; Endosonography; Biopsy, fine-needle; Adenocarcinoma, mucinous; Stomach
MeSH: Adenocarcinoma, Mucinous*; Appendix; Biopsy, Fine-Needle; Diagnosis; Endosonography; Epithelium; Humans; Mucins; Stomach; Ultrasonography
From:Clinical Endoscopy 2014;47(5):460-463
CountryRepublic of Korea
Language:English
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.