title: The value of EUS in predicting the response of gastric mucosa-associated lymphoid tissue lymphoma to Helicobacter pylori eradication.
abstract: BACKGROUND
  Gastric mucosa-associated lymphoid tissue (MALT) lymphoma is associated with Helicobacter pylori infection, and regression of the tumor has been described after its eradication.
  
  
  OBJECTIVE
  To determine the value of EUS, in addition to other clinical/endoscopic features, in predicting the response of low-grade MALT lymphoma to H pylori eradication.
  
  
  METHODS
  A retrospective, single-center study.
  
  
  METHODS
  Twenty-two patients with primary gastric MALT lymphoma were identified through a retrospective review of charts of patients seen at the American University of Beirut Medical Center. Only 19 patients with histopathologically confirmed gastric MALT lymphoma and H pylori infection who had EUS staging were included in the study.
  
  
  METHODS
  Regression of the gastric MALT lymphoma as determined by follow-up endoscopy and mucosal biopsies.
  
  
  RESULTS
  Patients with disease restricted to the gastric mucosa had a significantly higher rate of complete remission after H pylori eradication compared with patients who had disease infiltrating into the gastric submucosa (77.8% vs 12.5%, P value .007). There was no statistical difference in terms of the mean follow-up time to achieve such response (P value .212). Age, sex, location of the tumor within the stomach, and endoscopic appearance did not correlate with the probability of complete remission of the MALT lymphoma.
  
  
  CONCLUSIONS
  The limitations include a retrospective design and a relatively small sample population.
  
  
  CONCLUSIONS
  EUS determination of the invasion depth of gastric MALT lymphoma helps predict a complete response to H pylori eradication.
authors.affiliation: Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon.
authors.forename: Lara M N
authors.initials: LM
authors.lastname: El-Zahabi
authors.forename: Faek R
authors.initials: FR
authors.lastname: Jamali
authors.forename: Ihab I
authors.initials: II
authors.lastname: El-Hajj
authors.forename: Mohammed
authors.initials: M
authors.lastname: Naja
authors.forename: Ziad
authors.initials: Z
authors.lastname: Salem
authors.forename: Ali
authors.initials: A
authors.lastname: Shamseddine
authors.forename: Nagi S
authors.initials: NS
authors.lastname: El-Saghir
authors.forename: Ghazi
authors.initials: G
authors.lastname: Zaatari
authors.forename: Fady
authors.initials: F
authors.lastname: Geara
authors.forename: Assaad M
authors.initials: AM
authors.lastname: Soweid
mesh_terms: D000368:Aged; D019160:Endosonography; D005260:Female; D016481:Helicobacter Infections / Q000150:complications* / Q000188:drug therapy; D016480:Helicobacter pylori; D006801:Humans; D018442:Lymphoma, B-Cell, Marginal Zone / Q000000981:diagnostic imaging* / Q000382:microbiology / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D011379:Prognosis; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging* / Q000382:microbiology / Q000473:pathology