Diagnostic value of multi-slice spiral CT colonoscopy in colorectal neoplasms / 第三军医大学学报

ABSTRACT

Objective To study the value of multi-slice spiral CT virtual colonoscopy(CTVC) in diagnosing colorectal neoplasms.Methods Forty-one patients with colorectal neoplasms proven by colonoscopy were further scanned successively by a 16-slice spiral CT with thin-section after intra-anal air insufflation.Then the data were 3D reconstructed simulating in virtual endoscopy and the results were compared with what seen with the conventional colonoscopy and the clinic pathological findings.Results A total of 21 polyps in 12 patients were discovered by colonoscopy,while 15 polyps in 10 patients by CTVC.In addition,29 cases of colorectal cancer were diagnosed by colonoscopy,and 27 cases of colorectal cancer were discovered by CTVC.Besides,two cases of liver metastasis and one case of lymph node metastasis in posterior peritoneal cavity were demonstrated in colonic cancer by CTVC.Conclusion CTVC is a non-invasive and valid technique for colonic occupying lesion,which can demonstrate not only the location and the size of colorectal neoplasms,but also the invasive depth and extracolonic metastasis.CTVC has an important value in clinical stage and choice of surgery for colorectal cancer.