FABP4 and melanoma: Table 2 shows the results and indicates the statistical significance of distribution above or below the given threshold, according to the Fisher exact test, for both melanoma and colorectal cancer data for all 8 genes investigated. The threshold value was chosen as the value best discriminating the largest population within the controls. The following threshold values were used: CD36: 1000; MARCO: 150; FABP1: 100 in melanoma and 1000 in colorectal cancer; FABP2: 100; FABP3: 250; FABP4: 2000; FABP6: 200; FABP7: 500. FABP5 does not appear in the IST Online database.