Quantitation of urine normetanephrine (NMN) and metanephrine (MN), collectively referred to as “metanephrines,” together with plasma metanephirne levels is useful as the initial screen to aid in the diagnosis and follow-up of catecholamine-producing tumors, pheochromocytoma and paraganglioma. 24-hr urine is highly recommended.
Monday, Wednesday, Friday
Normetanephrine: 69 – 750 ug/g creatinine
Metanephrine: 27 – 270 ug/g creatinine