Table 2.

Tissue biomarkers found by DESI-MSI (Desorption-Electrospray-Ionization—Mass Spectrometry Imaging) and their occurrence in plasma samples of breast cancer patients analyzed by LC-MS/MS (Liquid Chromatography—tandem Mass Spectrometry).

Tissue Biomarkers for No Special Type (NST) Ductal Carcinoma of the Breast [28]	Prevalence in Plasma Samples of Breast Carcinoma (NST and Special Type) Patients According to LC-MS/MS Results
PS(34:1); PE(38:4); PS(38:4); PI(34:1); PS(40:4); PI(36:2); PI(38:3); PE(36:2); PE(O-38:6); PE(O-38:5); PS(36:2); PS(36:1); PC(34:2); PC(34:1); PS(38:1); PI(34:0); PI(38:4)	Yes
PG(34:1); PG(36:2); PG(40:7); PS(O-41:0); Cer(t42:1); CL(72:8); CL(72:7); PA(38:2); PS(O-33:0); PE(O-38:4); PG(36:4); PS(P-36:2); PE(39:5); TG(52:3)	No

PS: glycerophosphoserine, PE: glycerophosphoethanolamine; PI: glycerophosphoinositol; PC: glycerophosphocholine; PG: glycerophosphoglycerol; Cer: ceramide; CL: cardiolipin; PA: phosphatidic acid; TG: triacylglycerol. Lipid species are described by the numbers of fatty acid chain carbons and double bonds.