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Differentiation of autoimmune pancreatitis from pancreas cancer: utility of anti-amylase and anti-carbonic anhydrase II autoantibodies

PURPOSE: To investigate the utility of different combinations of serum anti-carbonic anhydrase II antibodies (CA II Abs), anti-α amylase antibodies (AMY-α Abs) and IgG4 levels for the diagnosis of autoimmune pancreatitis (AIP). METHODS: We recruited 93 patients with clinical suspicion for AIP and 94...

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Autores principales: Sánchez-Castañón, M., de las Heras-Castaño, G., Gómez, C., López-Hoyos, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer International Publishing 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4389022/
https://www.ncbi.nlm.nih.gov/pubmed/26000123
http://dx.doi.org/10.1007/s13317-011-0024-x
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author Sánchez-Castañón, M.
de las Heras-Castaño, G.
Gómez, C.
López-Hoyos, M.
author_facet Sánchez-Castañón, M.
de las Heras-Castaño, G.
Gómez, C.
López-Hoyos, M.
author_sort Sánchez-Castañón, M.
collection PubMed
description PURPOSE: To investigate the utility of different combinations of serum anti-carbonic anhydrase II antibodies (CA II Abs), anti-α amylase antibodies (AMY-α Abs) and IgG4 levels for the diagnosis of autoimmune pancreatitis (AIP). METHODS: We recruited 93 patients with clinical suspicion for AIP and 94 patients as control groups between June 2003 and October 2009. Serum antibodies were measured using homemade enzyme linked immunosorbent assay and IgG4 levels were determined by nephelometry. RESULTS: Both CA-II Abs and AMY-α Abs had the highest sensitivity (83%) although AMY-α Abs (89%) were more specific than CA-II Abs (75%). The presence of increased IgG4 levels was the most specific serological marker (94%), but it had the lowest sensitivity (58%). The combination of the three serological markers altogether had the highest specificity (99%) and positive predictive value (PPV) (86%), but they had a rather low sensitivity (50%). When we combined CA-II Abs and AMY-α Abs without IgG4 levels, we got the highest sensitivity (75%) and negative predictive value (98%) but the specificity and the PPV decreased to 93 and 50%, respectively. Importantly, AMY-α Abs were not detected in pancreas cancer. CONCLUSIONS: The presence of serum CA-II and AMY-α Abs with increased IgG4 is useful in the differential diagnosis of AIP from pancreatic cancer.
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spelling pubmed-43890222015-05-21 Differentiation of autoimmune pancreatitis from pancreas cancer: utility of anti-amylase and anti-carbonic anhydrase II autoantibodies Sánchez-Castañón, M. de las Heras-Castaño, G. Gómez, C. López-Hoyos, M. Auto Immun Highlights Original Article PURPOSE: To investigate the utility of different combinations of serum anti-carbonic anhydrase II antibodies (CA II Abs), anti-α amylase antibodies (AMY-α Abs) and IgG4 levels for the diagnosis of autoimmune pancreatitis (AIP). METHODS: We recruited 93 patients with clinical suspicion for AIP and 94 patients as control groups between June 2003 and October 2009. Serum antibodies were measured using homemade enzyme linked immunosorbent assay and IgG4 levels were determined by nephelometry. RESULTS: Both CA-II Abs and AMY-α Abs had the highest sensitivity (83%) although AMY-α Abs (89%) were more specific than CA-II Abs (75%). The presence of increased IgG4 levels was the most specific serological marker (94%), but it had the lowest sensitivity (58%). The combination of the three serological markers altogether had the highest specificity (99%) and positive predictive value (PPV) (86%), but they had a rather low sensitivity (50%). When we combined CA-II Abs and AMY-α Abs without IgG4 levels, we got the highest sensitivity (75%) and negative predictive value (98%) but the specificity and the PPV decreased to 93 and 50%, respectively. Importantly, AMY-α Abs were not detected in pancreas cancer. CONCLUSIONS: The presence of serum CA-II and AMY-α Abs with increased IgG4 is useful in the differential diagnosis of AIP from pancreatic cancer. Springer International Publishing 2011-09-07 /pmc/articles/PMC4389022/ /pubmed/26000123 http://dx.doi.org/10.1007/s13317-011-0024-x Text en © Springer-Verlag 2011
spellingShingle Original Article
Sánchez-Castañón, M.
de las Heras-Castaño, G.
Gómez, C.
López-Hoyos, M.
Differentiation of autoimmune pancreatitis from pancreas cancer: utility of anti-amylase and anti-carbonic anhydrase II autoantibodies
title Differentiation of autoimmune pancreatitis from pancreas cancer: utility of anti-amylase and anti-carbonic anhydrase II autoantibodies
title_full Differentiation of autoimmune pancreatitis from pancreas cancer: utility of anti-amylase and anti-carbonic anhydrase II autoantibodies
title_fullStr Differentiation of autoimmune pancreatitis from pancreas cancer: utility of anti-amylase and anti-carbonic anhydrase II autoantibodies
title_full_unstemmed Differentiation of autoimmune pancreatitis from pancreas cancer: utility of anti-amylase and anti-carbonic anhydrase II autoantibodies
title_short Differentiation of autoimmune pancreatitis from pancreas cancer: utility of anti-amylase and anti-carbonic anhydrase II autoantibodies
title_sort differentiation of autoimmune pancreatitis from pancreas cancer: utility of anti-amylase and anti-carbonic anhydrase ii autoantibodies
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4389022/
https://www.ncbi.nlm.nih.gov/pubmed/26000123
http://dx.doi.org/10.1007/s13317-011-0024-x
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