Figure 1.

Representative GC/TOF-MS total ion current (TIC) chromatograms of serums and tissues: (a) patient serum, (b) normal serum, (c) cancer tissue, and (d) tumor-adjacent tissue. Parts of the peaks were identified as 1, lactic acid; 2, alanine; 3, valine; 4, leucine; 5, proline; 6, glycine; 7, uracil; 8, fumaric acid; 9, serine; 10, threonine; 11, malic acid; 12, pyroglutamic acid; 13, asparagine; 14, hydroxyproline; 15, creatinine; 16, ornithine; 17, glutamic acid; 18, phenylalanine; 19, ribose; 20, glutamine; 21, hypoxanthine; 22, glucose; 23, hexadecanoic acid; 24, linoleic acid; 25, oleic acid; 26, tryptophan; 27, stearic acid; 28, glucose-6-phosphate; 29, maltose; and 30, cholesterol.