Hi @sallik74 - the largest tumor of my colorectal cancer was at the cecum. Just for other readers' benefit, according to https://radiologyinplainenglish.com/what-is-suv-on-pet-scan/ , "SUV values greater then 2.5 raise concern for cancer although inflamed or infected tissues can also be above 2.5. Cancerous tissues can also have SUVs less then 2.5. A higher SUV is more concerning for cancer. But it’s important to remember that a high SUV value does not give us a diagnosis of cancer or anything else by itself. High SUV simply alerts us to a potential abnormality. The radiologist interpreting the scan will use all available information to arrive at the correct diagnosis."