A member asked:

Is it common to see high plasma free normetanephrine of 1.2 nmol (pf met < .20, w/ previous elevated total normet)? do you rule out pheo if a later urine normet is normal w/ pf normet of 0.65 nmol?

3 doctors weighed in across 2 answers

Pheo: Yes, this rules out pheo but consider hyperadrenergic syndrome.

Answered 5/27/2013

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Pheo and labs : In pheochomocytoma, typically the values range 3x the upper limit of normal. The episodes can be intermittent, so you cannot be totally reassured by normal values if you are clinically suspicious. A Clonidine suppression test may be helpful.

Answered 6/24/2014

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