摘要: Blastocystis hominis is an intestinal parasite of uncertain significance. The ultrastructural diagnosis B. infection in the stool 320 patients seen a gastroenterology out-patient clinic has been evaluated. Of cohort, 83 had colorectal cancer, 35 adenoma and 73 entirely normal colonic mucosa. There similar incidence with epithelium (36%) (34%) but increased Dukes' A, B C carcinoma (53%). If are statistically analysed by logistic regression analysis, adjustment for age, sex time year sample collected, there significant difference between two groups (P = 0.016). This resulted hypothesis shown Figure 1. Figure 1 Proposed hypothesis EDITORIAL COMMENT Can hominis, parasite, be implicated aetiology cancer? A mere association does not indicate causation. might flourish environment cancer – perhaps due to obstruction. Any comments on hypothesis?