Plasma free metanephrines (pheochromocytoma/paraganglioma surveillance — VHL/MEN2/SDH)
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| ID | BIO-METANEPHRINES-PLASMA-PHEO |
|---|---|
| Tipo | Biomarcador |
| Alegais | Metanefrinas Livres de PlasmaMetanefrinas plasmáticas fracionadasmetanefrina plasmáticanormetanefrina plasmáticaМетанефрини плазми вільні (нагляд феохромоцитоми/парагангліоми — VHL/MEN2/SDH) |
| Estado | reviewed 2026-05-18 | pending_clinical_signoff |
| Doenças | DIS-PHEOCHROMOCYTOMA |
| Fontes | SRC-ENDOCRINE-SOCIETY-MEN-2023 SRC-NCCN-KIDNEY-2025 SRC-NCCN-NET-2025 |
Fatos de biomarcadores
| Tipo de biomarcador | serum_marker |
|---|---|
| Medição | MétodoPlasma CL-MS/MS (preferido) ou imunoensaio; dor dor de cabeça ≥30 min antes do sorteio Unidadespg/mL ou nmol/L (intervalos de referência dependentes do ensaio; metanefrina e normetanefrina relatados separadamente) |
| Biomarcadores relacionados | Nenhuma declaração |
Notas
Catecholamine-metabolite biomarker — gold-standard biochemical test for pheochromocytoma and paraganglioma (PPGL). Preferred for asymptomatic surveillance in syndromic carriers: VHL (annual, lifelong), MEN2A/MEN2B (annual after age 5-8 per RET codon stratification), SDHB/SDHC/SDHD/SDHA (annual, starting age 6-10 per Endocrine Society 2023). Sensitivity ~96-99% for PPGL when properly drawn; specificity ~85-95% (lower with drug/dietary interferents). VHL Type 1 lacks pheo; Type 2A/2B/2C have pheo as defining feature — surveillance schedule keyed to VHL phenotype classification (see BIO-VHL-CLASSIFICATION-PHENOTYPE). Elevation >3-4x upper limit highly suggestive; intermediate elevation prompts clonidine suppression test or 24-h urinary fractionated metanephrines as confirm. Imaging (MRI abdomen + I-123 MIBG or 68Ga-DOTATATE PET) when biochemistry positive. STUB pending two-Co-Lead signoff.
Usado por
Relevância terapêutica
BMA-METANEPHRINES-PHEO-VHL-MEN2-SURVEILLANCE- Plasma free metanephrines are the gold-standard biochemical test for pheochromocytoma and...
Biomarcador
BIO-VHL-CLASSIFICATION-PHENOTYPE- VHL phenotype classification (Type 1 / 2A / 2B / 2C)