title: [Detection of gastric preneoplastic lesions with serum levels of pepsinogen in Chilean subjects].
abstract: BACKGROUND
  Gastric cancer has a direct relation with chronic atrophic gastritis (AG) and intestinal metaplasia (IM), considered as preneoplastic lesions. Determination of serum pepsinogen llevéis (PGI) and pepsinogen I / pepsinogen II ratio (PGI/PGII) can detect this conditions; achieving 70-90% of gastric cancer detection in early stages.
  
  
  OBJECTIVE
  To determine the cut-off values for serum PGI and PGI/PGII in Chilean subjects, for the detection of gastric preneoplastic lesions, establishing their sensitivity, specificity, positive (PPV) and negative (NPV) predictive values.
  
  
  METHODS
  Prospective study of patients subjected to upper gastrointestinal endoscopy and determination of serum pepsinogen levels. The presence and severity of preneoplastic lesions were compared with serum levels of PGI and PGI/PGII.
  
  
  RESULTS
  A total of 56 men and 44 women were studied, with a mean age of 43 (14-77) years. There was a significant association (p <0.001) of PGI and PGI/PGII with AG and IM. We obtained a cut-off value of 2.3 for PGI/PGII (sensitivity =70%>, specificity =92%>, PPV =60%>, NPV =95%) and 36 ng/ml for PGI (sensitivity =62%o specificity =64%o, PPV =20%o, NPV =91%), for detection of moderate to severe AG. No patient with normal mucosa had a PGI <20 ng/ml. The combined criteria of PGI/II < or = 2.3 and/or PGI < or 20 ng/ml, obtained a sensitivity of 85%o, specificity of 92%>, PPV of 65%o, and NPV of 97%o.
  
  
  CONCLUSIONS
  We confirmed a strict relation ofPGIand PGI/PGIIwith the presence of preneoplastic gastric lesions in Chilean patients.
authors: Becado de Cirugía General, Universidad de Valparaíso-Campo Clínico Hospital Clínico de la Fuerza Aérea de Chile. jignaciofdez@gmail.com
authors: José Ignacio
authors: JI
authors: Fernández F
authors: Xabier
authors: X
authors: de Aretxabala U
authors: Ricardo
authors: R
authors: Santander D
authors: Samuel
authors: S
authors: Sabah T
authors: Jorge
authors: J
authors: Maira S
authors: Alex
authors: A
authors: Navarro R
authors: Marcela
authors: M
authors: Planzer D
authors: Fernando
authors: F
authors: Gómez L
authors: Miguel
authors: M
authors: Etchart
authors: Iván
authors: I
authors: Gallegos
authors: Ximena
authors: X
authors: Torrens
authors: Gerardo
authors: G
authors: Fasce P
authors: Ivette
authors: I
authors: Reydet
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000097:blood*; D002677:Chile; D005260:Female; D005753:Gastric Mucosa / Q000201:enzymology / Q000382:microbiology / Q000473:pathology; D005757:Gastritis, Atrophic / Q000097:blood / Q000473:pathology*; D016481:Helicobacter Infections / Q000150:complications; D016480:Helicobacter pylori / Q000472:pathogenicity; D006801:Humans; D008297:Male; D008679:Metaplasia; D008875:Middle Aged; D020116:Pepsinogen A / Q000097:blood; D020115:Pepsinogen C / Q000097:blood; D010435:Pepsinogens / Q000097:blood*; D011230:Precancerous Conditions / Q000097:blood / Q000473:pathology*; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012720:Severity of Illness Index; D013274:Stomach Neoplasms / Q000097:blood / Q000201:enzymology / Q000473:pathology*
chemical_list: D014408:Biomarkers, Tumor; D010435:Pepsinogens; D020115:Pepsinogen C; D020116:Pepsinogen A