Comparison of clinical value of CT and MRI in preoperative diagnosis of lymph node metastasis of rectal cancer
Objective To analyze the clinical value of CT and magnetic resonance imaging(MRI)in preoperative diagnosis of lymph node metastasis of rectal cancer.Methods 70 patients with rectal cancer were divided into malignant lymph node group(49 cases with lymph node metastasis)and benign lymph node group(21 cases without lymph node metastasis).All patients were given CT and MRI examinations before surgery.CT and MRI imaging findings were compared between the two groups.The diagnostic efficacy of CT and MRI for lymph node metastasis was compared.Results CT examination showed a total of 76 lymph nodes in the benign lymph node group and 388 lymph nodes in the malignant lymph node group.The number,size,and short aspect ratio of lymph nodes in the malignant lymph node group were(7.92±1.44)nodes,(0.66±0.18)cm,and(0.84±0.13),which were higher than(3.62±1.58)nodes,(0.53±0.15)cm,and(0.73±0.18)in the benign lymph node group(P<0.05).MRI showed that the detection rates of pericolonic fat mixed signals,venous wrapping sign and serous membrane infiltration in the malignant lymph node group were 71.43%,77.55%and 61.22%,which were higher than 0,9.52%and 23.81%in the benign lymph node group(P<0.05).Using pathological results as the gold standard,the diagnostic accuracy,specificity and sensitivity of CT were 88.57%,80.95%and 91.84%,which were lower than 100.00%,100.00%and 100.00%of MRI.Conclusion Compared with CT examination,MRI examination has a higher diagnostic rate,specificity,and sensitivity in the preoperative diagnosis of lymph node metastasis of rectal cancer,thereby helping patients clarify their condition and laying the foundation for surgical treatment.
CTMagnetic resonance imagingPreoperative diagnosisLymph node metastasis of rectal cancerApplication effect
万方数据
维普
