Table 1.
Laboratory results
| Serum/urine marker | Value | Age‐matched normal range |
|---|---|---|
| Urinary catecholamine breakdown products | ||
| HVA (mg/g creatinine) | 11.5 | 3–15 |
| VMA(mg/g creatinine) | 14.3 | 3–9 |
| Serum catecholamines | ||
| Epi (pg/mL) | 213 | 456 |
| NoEpi (pg/mL) | 1247 | 1252 |
| Spot urine catecholamines | ||
| Epi (μg/g creatinine) | 52 | 4–32 |
| NoEpi (μg/g creatinine) | 317 | 20–108 |
| 24‐h urine catecholamine | ||
| Epi (μg/24 h) | 3 | 1–7 |
| NoEpi (μg/24 h) | 66 | 5–41 |
| 24‐h urine metanephrines (μg/24 h) | 60 | 11–139 |
| 24‐h urine normetanephrines (μg/24 h) | 269 | 31–398 |
| Plasma renin activity (ng/mL per h) | 132.4 | 0.25–5.82 |
| Serum aldosterone (ng/dL) | 71 | <9 |
HVA, homovanillic acid; VMA, vanillylmandelic acid; Epi, epinephrine; NoEpi, norepinephrine.