ALX4 and cancer: Using SEPT9 + ALX4 and classifying a sample as “positive” if any of the single markers is “positive” (at least 2 of the 3 measurements), we observed 4 positive cases among the 22 healthy controls (18%), 25 positive cases among the 49 patients with polyps (51%) and 3 positive cases among the 5 cancer patients (Table 4).