title: Gastric outlet obstruction with benign endoscopic biopsy should be further explored for malignancy.
abstract: BACKGROUND
  Gastric outlet obstruction is commonly considered a complication of peptic ulcer disease. Malignancy accounts for up to 39% of gastric outlet obstruction. The object of this study was to evaluate the reliability of endoscopic biopsies in excluding malignancy as the cause of gastric outlet obstruction.
  
  
  METHODS
  A retrospective study of 40 consecutive patients admitted with gastric outlet obstruction was conducted. Patient demographics, their use of H2-receptor antagonists or nonsteroidal anti-inflammatory drugs, and history of peptic ulcer disease were recorded. Histopathologic results of the endoscopic biopsy and surgical specimen were reviewed. The diagnosis based on the surgical specimen was considered the gold standard.
  
  
  RESULTS
  Sixteen patients (40%) had malignant gastric outlet obstruction. Seven patients had gastric adenocarcinoma and nine had extragastric tumors. The patients with malignant obstruction were significantly older (> 55 years) (p = 0.03; odds ratio: 95% CI: 5.21 [1.05-23.49]). Gastric cancer patients had less frequently a history of peptic ulcer disease when compared with patients with benign gastric outlet obstruction (p = 0.04; odds ratio: 95% CI: 5 [1.04-38.13]). Endoscopic biopsy to detect malignant obstruction had poor sensitivity (i.e., 37%) when compared with biopsies of the surgical specimen. In three of seven patients with gastric cancer (40%), repeated jumbo biopsies were negative for malignancy.
  
  
  CONCLUSIONS
  Patients with gastric outlet obstruction who had endoscopic biopsies negative for cancer should be explored surgically before embarking on medical therapy. The surgical exploration is especially important in gastric outlet obstruction patients who are considered at high risk for malignancy, that is, those who are older and have no history of peptic ulcer disease.
authors.affiliation: Department of Gastroenterology and Hepatology, University of New Mexico Health Sciences Center, Albuquerque 87131-5271, USA.
authors.forename: A
authors.initials: A
authors.lastname: Awan
authors.forename: D E
authors.initials: DE
authors.lastname: Johnston
authors.forename: M M
authors.initials: MM
authors.lastname: Jamal
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001706:Biopsy / Q000379:methods*; D005260:Female; D017219:Gastric Outlet Obstruction / Q000209:etiology* / Q000473:pathology*; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D016017:Odds Ratio; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013274:Stomach Neoplasms / Q000150:complications* / Q000473:pathology*