title: Fine needle aspiration biopsy of gastric duplication cysts with endoscopic ultrasound guidance.
abstract: OBJECTIVE
  To evaluate the ability of endoscopic ultrasound (EUS)-guided fine needle aspiration biopsy (FNAB) to diagnose gastric duplication cysts.
  
  
  METHODS
  FNAB reports from the Department of Pathology, Saint Louis University Hospital, were retrospectively searched for reports of EUS-guided FNABs of the stomach. These reports were then reviewed to find instances in which gastric duplication cysts were diagnosed. The charts of patients diagnosed with gastric duplication cysts were reviewed.
  
  
  RESULTS
  Two patients were identified. The first was a 35-year-old, Caucasian male with an asymptomatic submucosal (versus extrinsic) gastric mass discovered during computed tomography of the abdomen. The second was a 44-year-old, Caucasian male with a history of treated low grade B cell lymphoma of mucosa-associated lymphoid tissue (MALToma) who was found to have an asymptomatic gastric wall abnormality by EUS when undergoing follow-up for the MALToma. Respiratory-type epithelial cells were present in each of these gastric duplication cysts. At this writing, both patients were being followed clinically and with imaging.
  
  
  CONCLUSIONS
  Gastric duplication cysts, particularly those that have respiratory-type epithelium, can be diagnosed by EUS-guided FNAB. The diagnosis of gastric duplication cysts by EUS-guided FNAB can preclude surgery, with its associated morbidity.
authors.affiliation: Department of Pathology, Saint Louis University School of Medicine, St. Louis, Missouri, USA. pondertb@slu.edu
authors.forename: T Brent
authors.initials: TB
authors.lastname: Ponder
authors.forename: Brian T
authors.initials: BT
authors.lastname: Collins
mesh_terms: D000328:Adult; D001707:Biopsy, Needle / Q000295:instrumentation / Q000379:methods* / Q000639:trends; D002828:Choristoma / Q000000981:diagnostic imaging / Q000473:pathology; D003560:Cysts / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology*; D003937:Diagnosis, Differential; D019160:Endosonography / Q000295:instrumentation / Q000379:methods* / Q000639:trends; D005753:Gastric Mucosa / Q000002:abnormalities* / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D020545:Respiratory Mucosa / Q000473:pathology; D012189:Retrospective Studies; D013272:Stomach Diseases / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology*