Table 1.

Tentative lipid assignments for the top three significant lipids in each model

Model	m/z	Lipid	Configuration	Ion
Cancer vs Normal	673.481	Phosphatidic acid	PA(34:1)	[M − H]−
	699.497	Phosphatidic acid/Phosphatidyl-ethanolamine	PA(36:2 / PE(34:1)	[M − H]–/[M − NH3]−
	744.555	Phosphatidyl-ethanolamine	PE(36:1)	[M − H]−
Cancer vs BOT	699.497	Phosphatidic acid/Phosphatidyl-ethanolamine	PA(36:2 / PE(34:1)	[M − H]−/[M − NH3]−
	742.539	Phosphatidyl-ethanolamine	PE(36:2)	[M – H]−
	685.517	Phosphatidic-acid-plasmalogen	PA(P-36:1)	[M − H]−

Tandem MS and LipidMAPS used along with locally derived lipid data sets from previous REIMS work to tentatively assign lipid classifications and configurations. PA phosphatidic acid, PE phosphatidyl-ethanolamine