A result three times higher than the upper reference limit strongly indicates a neuroendocrine tumor. Minor increases (less than double) may stem from stress, drugs, or collection errors.
Interpretation relies on comparing 24-hour excretion levels against established reference ranges. A result three times higher than the upper
Cases of unusually severe or intermittent high blood pressure, especially before age 20. A result three times higher than the upper
A common malignant tumor in children derived from the neural crest. A result three times higher than the upper