Table 2.
Biochemical Information
| No. with elevated levels | Mean ± SD (range) | |
|---|---|---|
| Chromogranin A, ng/mL* (ULN= 225) | 23 | 3,659.2 ± 3,826.9 (269–27,600) |
| Dopamine, serum, pg/mL, (ULN = 46) | 11 | 641.4 ± 792.8 (59–2,077) |
| Epinephrine, serum, pg/mL (ULN = 83) | 6 | 357.0 ± 235.9 (94–616) |
| Norepinephrine, serum, pg/mL (ULN = 498) | 26 | 3,505.9 ± 4,492.2 (518–16,550) |
| Metanephrines, serum, pg/mL (ULN = 61) | 7 | 567.6 ± 632.7 (69–1,892) |
| Normetanephrines, serum, pg/mL (ULN = 112) | 29 | 1,346.4 ± 1,444.6 (115–4,309) |
| Fractionated Metanephrines, urine, μg/24 h (ULN = 400) | 4 | 5,281.3 ± 3,385.9 (915–8,946) |
While no one lab value was elevated for all 30 patients, all patients had at least one elevated lab value.
*
Only one patient had isolated chromogranin A elevation without elevated catecholamines. ULN, upper limit of normal.