Diagnosis and Staging of Rectal Carcinoma on CT

Purpose: To evaluate the CT in the diagnosis of rectal carcinoma and its staging. Materials and Methods: CT data of 150 cases of surgical pathologically verified rectal carcinoma were retrospectively reviewed to evaluate the accuracy in tumor detection and staging. Results: The imaging findings of rectal carcinoma on CT included wall thickening (n=50), soft mass (n=61) and lumen narrowing (n=49). With reference to surgical and pathological findings, the accuracies of CT in detecting lesions, delineating perifocal invasion and lymph nodes metastasis is 96.7%(145/150), 88.4%(84/95) and 51.7%(15/29), respectively. The consistency between CT and Dukes stages is 83.3%. Conclusion: CT is well consistent with pathological stages on rectal carcinoma and it is helpful for its surgical planning.