Diagnostic Accuracy and Prognostic Value of 18F FDG PET-CT in the Follow up of Patients With Colorectal Carcinoma.

The goal of this observational study is to learn about the diagnostic and prognostic value of 18f fdg pet ct in follow up of colorectal cancer patients The main question it aims to answer is: Does pet ct have a role in treatment decision in colorectal cancer patients? Participants already be undergoing for pet ct as part of their follow up routine and will be followed up for 5 years.

The importance of pet ct in follow up od CRC patients and see OS.

Inclusion Criteria: * all patients with colorectal cancer recieved treatment Exclusion Criteria: * pregnent women