Colon polyp 0.3cm is relatively not serious, generally belongs to benign lesions, but over time may also be transformed into malignant tumors, so you need to timely pathological examination and regular follow-up. The 0.3cm colon polyps are small in size and generally belong to benign lesions. Patients should go to the hospital for examination in time. If the polyps have suspicious lesions, they may have the tendency to become cancerous and need to undergo pathological examination. If the colon polyps are benign lesions, they can be removed surgically under the microscope and reviewed regularly after the surgery. The timely removal of colon polyps can effectively reduce the incidence of cancer and the prognosis is better.