The Distribution Of Position And Size Of Lymph Nodes Detected By Mri In Patients With Cervical Cancer

Objective: To analyze and disscuss the distributing characteristics and the range of lymph nodes (LN)detected by magnetic resonance imaging(MRI) in patients with cervical cancer. Methods: magnetic resonance imaging was performde in54patients with cervical cancer. use the picture archiving and communication system (PACS). The frequency of nodes in each stations and the size of each LN were retrospectively studied. Sensitivity and Specificity were evaluated by means of receiveroperator characteristic curve(ROC).Results: lymph node with the closing hole andthe internal iliac vessels travel area in Cervical cancer detected by MRI are the most, detection rate and the detection lymph node number constituent ratio respectively is: N0.1：89%，35%; N0.2:86.5%,32%; Inguinal deep and iliac the second, respectively N0.3;78%,20%; N0.4:44%,11%; Common iliac lymph node detection rate was significantly lower than in the pelvic cavity, the detection rate for N0.5:24%,7%;Constituent ratio for; Transfer group is more than10mm,5-10mm, less than5mm respectively in the detection of lymph node of the total number of39.8%,51.2%,9%. According to ROC analysis, when5mm,8mm,10mm size criterions wereapplied, the sensitivity and specificity were75.5%and38.9%,23.3%and49.5%and69.6%,23.3%and96.4%, respectively(Az=0.669).Conclusion: MRI detection lymph nodes with cervical cancer are mainly distributed in the obturator and internal iliac, inguinal deep and iliac, the second cervical lymph node metastasis group, Mostnodes of cervical cancer metastases lymph node have small size, with<8.5mm’s accounting for62%,It is difficult to reach both high sensitivity and specificity usingsize indictor to judge lymph node metastasis.