Table 1 Patient demographics and tumor characteristics
Characteristics | N = 21 (%) |
|---|---|
Number of tumors | 21 |
Number of patients | 19 |
Age (mean ± SD), years | 38.9 ± 10.9 |
Male : female | 12 (57.1%) : 9 (42.9%) |
Preoperative clinical feature Painless neck mass Detected on health screening Tongue deviation Episodes of syncope | 12 (57.1%) 7 (33.3%) 1 (4.8%) 1 (4.8%) |
Location Left Right Bilateral | 9 (42.9%) 7 (33.3%) 5 (23.8%) |
Tumor size (maximal diameter on CT image, mm) | 36.1 ± 12.9 |
Shamblin class Class I Class II Class III | 3 (14.3%) 9 (42.9%) 9 (42.9%) |
History of hypertension | 3 (14.3%) |
Preoperative catecholamine levels (mean ± SD)* Serum epinephrine (µg/mL) Serum norepinephrine (pg/mL) | 48.8 ± 57.0 370.1 ± 218.9 |
Preoperative catecholamine metabolite levels * Serum metanepinephrine (nmol/L) Serum normetanepinephrine (nmol/L) | 0.2 ± 0.1 0.5 ± 0.2 |
Preoperative 24-h urine catecholamine metabolites Metanepinephrine (µg) Normetanepinephrine (µg) Dopamine (µg) Vanillylmandelic acid (VMA) (µg) | 116.5 ± 44.2 273.6 ± 137.6 341.1 ± 118.9 4.5 ± 1.4 |
Distant metastasis Breast, spine, and lung | 2 (9.5%) † |