Recently had a colonoscopy and the report states very tight rectosigmoid, diffiicult colon and single diverticulum noted. what does all this mean.

Normal variation.: Normal colon for you, but difficult to move the scope around. A single diverticulum is a very common finding.

Need more info: Kath - the most concerning thing from what you are describing is "tight". It sounds like a stricture. The stricture is from chronic inflammation or a cancer. In either event, you are 44 years old. I would highly consider removing his part of your colon given these two findings. Please speak with your doctor further or with a surgeon.