Irritable bowel syndrome (IBS) is a gastrointestinal disorder characterized by chronic abdominal pain and altered bowel habits in the absence of any organic cause. As the clinical manifestations are very diverse and associated with nonspecific symptoms, research seeking to identify organic causes to rule out IBS and to enable differential diagnosis is required. A 24-year-old man was referred to our hospital for specialized management of IBS. He had a 7-month history of intermittent epigastric and lower abdominal pain. On the basis of clinical examination, he was diagnosed with IBS and administered medication at a primary clinic. However, his symptoms did not improve after treatment. We performed capsule endoscopy at our hospital and identified a parasite (Ancylostoma duodenale) in the proximal jejunum. We therefore report a case of parasitic infection found by additional examination while evaluating symptoms associated with a previous diagnosis of refractory IBS.

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• In Vivo Endoscopic Removal of Ancylostoma duodenale in a Patient with Abdominal Pain
  Soo-Young Na, Heung Up Kim, Young Ree Kim, Seung Uk Jeong, Sun-Jin Boo, Hyun Joo Song, Eun Kwang Choi, Byung-Cheol Song
  The Korean Journal of Helicobacter and Upper Gastrointestinal Research.2018; 18(1): 61.     CrossRef
• Refractory Irritable Bowel Syndrome and Functional Abdominal Pain Syndrome: Should Small Bowel Endoscopy Be Performed?
  Sung Kyun Yim, Sang Wook Kim
  Clinical Endoscopy.2018; 51(6): 508.     CrossRef

A submucosal gastric adenocarcinoma, especially the signet ring cell type, is rare. The histologic evaluation techniques for this lesion has not been established; however, histologic confirmation is very important for decision of treatment method. Here, we report a 57-year-old man with a 12-cm gastric submucosal signet ring cell type adenocarcinoma, diagnosed by an endoscopic ultrasound-guided Trucut biopsy and immunochemical studies. This case suggests that the endoscopic ultrasound-guided Trucut biopsy might be a useful diagnostic method in cases of gastric adenocarcinoma with features of gastrointestinal stromal tumor.

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• Subepithelial Tumor-like Gastric Cancer
  Kyoungwon Jung, Moo In Park
  The Korean Journal of Helicobacter and Upper Gastrointestinal Research.2021; 21(2): 106.     CrossRef
• Presentation of signet ring cell type at carcinoma ventriculi of the patient aged 20 years old
  Afrim Avdaj, Ugur Gozalan, Nexhmi Hyseni, Hatim Baxhaku, Sherif Krasniqi, Shpejtim Rramanaj
  Case Reports in Clinical Medicine.2013; 02(06): 358.     CrossRef