Fecal Hb levels in patients with UC, CD, invasive colorectal cancers, colorectal adenoma, and HCs were 3–12 302 ng/mL (median, 199 ng/mL), 2–23 623 ng/mL (median, 25 ng/mL), 9–76 404 ng/ml (median, 1334 ng/mL), 2–902 ng/mL (median, 18 ng/mL), and 0–28 ng/mL (median, 12 ng/mL), respectively (Table 2). The gene discussed is GSTM1; the disease is colorectal adenoma.