Flat polyps of 1.2 centimeters, depending on the size is not able to determine the severity. If it is a benign polyp is generally not serious, if there is a risk of malignant changes is a serious situation. 1. benign polyps: flat polyps mostly refers to the digestive tract flat polyps, most of which are benign polyps, if there is no malignant 1.2 cm polyps, generally not serious, can be removed through the colonoscopy flat polyps. 2. There is a risk of malignancy: flat polyps 1.2 cm. If the polyp has reached the intrinsic muscle layer and the submucosal layer to consider the risk of malignancy is a serious situation, should be promptly resected, and pathological examination to determine the nature. Flat polyps 1.2 centimeters, you should go to the regular hospital examination, follow the doctor’s instructions for treatment.