Free and total carnitine values are reported. A qualitative acyl carnitine profile is also obtained during this testing. Individual acyl carnitines can be qualitatively reported if requested or if clinically indicated.
Testing for plasma free metanephrines (the O-methylated metabolites of catecholamines) is now considered the preferred test in screening for the presence of neuroendocrine secreting tumours such as phaeochromocytomas and paragangliomas. Ref: Lenders et al 2002, JAMA 287:1427-1434