Table 2. Patient’s plasma metanephrine and chromogranin A results.

Analyte, unit	LC-MS/MS results	Reference range
Normetanephrine, pmol/L	1156	120-1180
Metanephrine, pmol/L	129	80-150
3’Methoxytyramine, pmol/L	100	< 180
Chromogranin A, pmol/L	30	0-60
LC-MS/MS - liquid chromatography with tandem mass spectrometry detection.