Antineutrophil antibody testing in suspected pediatric PSC

What is known

• The antineutrophil antibody detected in adult PSC was also found to be specific for childhood PSC, providing evidence for an autoimmune aetiology. ¹
• In a blinded series of 72 children's sera, 8 of 10 PSC patients were correctly identified and no ulcerative colitis patients showed the characteristic staining. ¹
• Three of eight children with chronic active hepatitis also showed the PSC staining pattern, limiting specificity against autoimmune liver disease. ¹

What is unknown / caveats

• Evidence is a single small blinded pediatric series (10 PSC patients); no formal diagnostic-pathway recommendation is provided
• Excerpts do not state whether antineutrophil antibody testing is routinely recommended over imaging/cholangiography for diagnosing pediatric PSC
• The excerpts show diagnostic potential but do not establish the test's role within a standardized pediatric PSC work-up.

References

1. Lo SK, Chapman RW, Cheeseman P, Charlton CP, Walker-Smith JA, Mieli-Vergani G, Fleming KA. Antineutrophil antibody: a test for autoimmune primary sclerosing cholangitis in childhood?. Gut. 1993. PMID: 8432473.

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Draft, generated by the IBDology RAG and not yet clinician-reviewed. Answers are grounded in the retrieved literature listed above; a high faithfulness score means the answer matches its sources, not that the sources are correct.