Is 2 yr f/u after 1.5cm peicemeal removal of SA in ascending colon on target? &2 tubular adenomas from sigmoid removed, all 3 LGD. Precancer or benign?

Sounds right. Tubular adenomas do occasionally progress to become cancers. Depends upon size and appearance under the microscope. If there is low grade dysplasia then there is no rush to re-scope. However they do need to be watched ( just like you would watch a funny mole on your skin.) Listen to your doc about the appropriate interval for repeating the colonoscope.