title: Gastric adenoma with atypical appearance: findings on double-contrast barium study with histopathologic correlation.
abstract: BACKGROUND
  To describe the radiologic findings of nonpolypoid gastric adenomas and to correlate them with pathologic findings.
  
  
  METHODS
  During a 9-year period, we reviewed 49 pure gastric adenomas in 43 patients with positive radiologic findings. Of these adenomas, seven with atypical polypoid appearance were retrospectively included in the study. We reviewed these findings with double-contrast barium study and correlated them with the pathologic findings.
  
  
  RESULTS
  Of seven nonpolypoid adenomas, four were depressed and three were flat at pathologic examination. All were diagnosed as early gastric carcinoma (five as type IIc, one as type IIb, one as type IIa + IIc) in upper gastrointestinal series. Three were located in the gastric angle, two in the lower body, and two in the antrum. Size ranged from 10 mm to approximately 25 mm (mean = 15 mm). Six lesions had nodular surface and five had convergency of the mucosal folds. A shallow depressed area was seen in six lesions.
  
  
  CONCLUSIONS
  A considerable proportion of gastric adenomas presents as a depressed or flat lesion on double-contrast barium study because of histologic characteristics of decreased subjacent mucosa. Because the nonpolypoid adenoma has a greater potentional for malignancy, more precaution is needed during the follow-up of this uncommon lesion.
authors.affiliation: Department of Radiology and Institute of Radiation Medicine, Seoul National University College of Medicine, 28, Yongon-dong, Chongno-gu, Seoul, 110-744, Korea.
authors.forename: S H
authors.initials: SH
authors.lastname: Kim
authors.forename: J K
authors.initials: JK
authors.lastname: Han
authors.forename: C J
authors.initials: CJ
authors.lastname: Yoon
authors.forename: S J
authors.initials: SJ
authors.lastname: Park
authors.forename: T K
authors.initials: TK
authors.lastname: Kim
authors.forename: C S
authors.initials: CS
authors.lastname: Song
authors.forename: B I
authors.initials: BI
authors.lastname: Choi
mesh_terms: D000236:Adenoma / Q000000981:diagnostic imaging* / Q000473:pathology; D018256:Adenomatous Polyps / Q000473:pathology; D000368:Aged; D001466:Barium Sulfate; D002277:Carcinoma / Q000473:pathology; D003287:Contrast Media; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate