A member asked:

24 hour urine catecholamine for a pheo- if a person does not have an episode during the 24 hours would it still show elevated levels. if so how?

A doctor has provided 1 answer
Dr. Philip Kern answered

Specializes in Endocrinology

Usually, yes: A pheo usually secretes catecholamines continuously, so it is not usually necessary to time the collection. These catecholamines yield a lot of breakdown products (eg. metanephrines). However, in some circumstances, if there is a very high suspicion for pheo and the initial tests are negative, and the attacks are sporadic, a urine collection timed with the episode is reasonable.

Answered 3/22/2015



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