Metanephrines
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General
Synonym/Acronym:
N/A
Common Use:
To assist in the diagnosis of cancer of the adrenal medulla or to assess for the cause of hypertension.
Specimen:
Urine from a timed specimen collected in a clean amber plastic collection container with 6N hydrochloride as a preservative.
Normal Findings:
(Method: High-pressure liquid chromatography)
| Age | Conventional Units | SI Units |
|---|---|---|
| Normetanephrines (Conventional Units × 5.07) | ||
| 3 mo–4 yr | 54–249 mcg/24 hr | 274–1,262 micromol/day |
| 5–9 yr | 31–398 mcg/24 hr | 157–2,018 micromol/day |
| 10–17 yr | 67–531 mcg/24 hr | 340–2,692 micromol/day |
| 18–39 yr | 35–482 mcg/24 hr | 177–2,444 micromol/day |
| Greater than 40 yr | 88–676 mcg/24 hr | 446–3,427 micromol/day |
| Metanephrines, Total (Conventional Units × 5.07) | ||
| 3 mo–4 yr | 79–345 mcg/24 hr | 401–1,749 micromol/day |
| 5–9 yr | 49–409 mcg/24 hr | 248–2,074 micromol/day |
| 10–17 yr | 107–741 mcg/24 hr | 543–3,757 micromol/day |
| 18–39 yr | 94–695 mcg/24 hr | 477–3,524 micromol/day |
| 40–49 yr | 182–739 mcg/24 hr | 923–3,747 micromol/day |
| Greater than 50 yr | 224–832 mcg/24 hr | 1,136–4,218 micromol/day |
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