Increased levels of fragments of SAA (~11,5 kDa and ~11,7 kDa) were detected by MALDI/SELDI spectrometry in serum of patients with different types of advanced cancer, for example, ovarian cancer [98], prostate cancer [48], renal cancer [54, 103], colon cancer [104], and lung cancer [34, 95, 105]. Here, SAA1 is linked to lung cancer.