During a recent sigmoidoscopy a small patch of inflammation was found on the left side of lower bowel. what is the most likely outcome?

Depends on biopsy: The significance of a "patch of inflammation" will depend almost entirely on the findings of a biopsy of the affected area. There are serious bowel diseases such as crohn's disease, that cause scattered patches of inflammation.

Hard to say: Given the limitted info you gave, it is hard to tell what exactly it is. Could be from recent mild infection, early colitis, lymphocytic/spastic colitis, or it may not be much at all.... Why was the procedure done? I assume some tissue sample/biopsy was done...If so, waite for the result.. Good luck...Keep us informed..