GSTM1 and diverticular disease: We also found diverticulosis to correlate with a mildly raised f-Hb(10–149 μg/g, p < 0.001) and a notable association between araised f-Hb and other lower GI malignancies (anal SCC or rectal lymphoma) (all 4cases f-Hb ≥ 400, p < 0.001).