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Chromobranne A (surveillance GEP-NET, MEN1)

Vue déterministe de l'entité source de la LJAM. L'autorité clinique demeure avec les ID de la source cités et l'état d'approbation de l ́examinateur.

IDBIO-CHROMOGRANIN-A-NET
TypeBiomarqueur
Alias
CHGACgAChromogranine AХромогранін A (нагляд GEP-NET, MEN1)
Étatreviewed 2026-05-18 | pending_clinical_signoff
MaladiesDIS-PNET
SourcesSRC-ENDOCRINE-SOCIETY-MEN-2023 SRC-NCCN-NET-2025

Données biomarqueurs

Type de biomarqueurserum_marker
Mesure
MéthodeImmunodosage sérique (RIA ou ELISA); gammes de référence dépendantes du dosage
Unitésng/mL
Échelle type
  • 0
  • 100
Biomarqueurs connexesAucune déclaration

Notes

Granin-family secretory protein, ubiquitously expressed in neuroendocrine cells. Used as a non-specific biomarker for GEP-NET (gastroenteropancreatic neuroendocrine tumors), MEN1-associated NETs (pancreatic, foregut), and pheochromocytoma (but plasma metanephrines preferred for pheo). NCCN recommends CgA as ADJUNCT, not standalone — annual surveillance in MEN1 carriers (pancreatic NET screening) typically combined with cross-sectional imaging (MRI or EUS) and gastrin/insulin/glucagon/VIP/PP panels per symptoms. Major confounders driving false-positive elevations: proton-pump inhibitor use (most common cause of elevation in clinical practice), atrophic gastritis, renal impairment, heart failure, chronic hepatitis, IBD. Less sensitive than gut-hormone panel for functional NETs. Limited utility for non-functioning small NETs. STUB pending two-Co-Lead signoff.

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Pertinence thérapeutique