Although gut diseases are numerous and show wide range ofvariations in their presentation and outcome yet, gastrointestinalmalignancies are among the leading causes of death worldwide.They show wide range of clinical and pathological presentations and through the correct diagnosis of such diseases, their complications and progress can be prevented. Multidetector CT has become an important modality for evalution of such diseases.It is not used only in the evaluation of the lumen , but it contributes as well in better demonstration of the bowel wall and adjacent tissues. In addition, it shows many advantages over single- section techinque as shorter acquisition time, retrospective creation of thinner and thicker images, better resolution and ease in performance. So, it can be used as the first diagnostic tool for suspected neoplastic lesions, post operative tumor recurrence and residual lesions .