The value of MPR reconstruction in the preoperative evaluation of esophageal cancer lymph nodes

YU Jinyu; SUN Dawei; SONG Xiaoyu; ZHU Jianguo; GONG Ruozhen

Abstract：Objective To evaluate the application values of MPR(multi-plane reformation) reconstruction of preoperative contrast-enhanced MSCT in the diagnosis of esophageal cancer lymph node metastasis. Methods 37 patients who were diagnosed of esophageal cancer were examined with preoperative contrast-enhanced multi-slice CT(MSCT). The rawdata was analyzed inde-pendently by the MPR reconstructed view group and routine axial view group to evaluate the No.105 group,No.106 group (No. 106 rec,No.106 tb,No.106 pre), No.107group, No.108 group, No.110 group, No.111 group, No. 2 group, No. 7 group lymph nodes of the 37 patients. The standard of lymph node metastasis included the shorter line larger than 7 mm or inhomoge-neous enhancement of the lymph node or fusion lymph node. The sensitivity,specificity and Younden index were used to evaluate the application values of MPR for diagnosis the esophageal cancer lymph node metastasis. All the dissected lesions were confined by the histopathology and classified by the <Japanese Classification of Esophageal Cancer,tenth edition>. Results 366 lymph nodes were dissected during the operation including 72 malignant lymph nodes which confirmed by pathology. MPR reconstructed view group found 360 lymph nodes and detected 80 malignant lymph nodes,in which 60 lymph nodes were proved to be true posi-tive. Routine axial view group found 327 lymph nodes and detected 42 malignant lymph nodes which were proved by pathology. The sensitivity,specificity and Younden index of the MPR reconstructed view group were 83.3%, 93.1%, 75%, 95.8%, 0.765;and for the Routine axial view group were 58.3%,88.4%,55.2%,89.6%,0.467. Conclusion The application of MPR in the preoperative contrast-enhanced MSCT has highly sensitivity,specificity,which plays a significant rule the diagnosis of esophageal cancer lymph node metastasis. This is also meaningful for the preoperative evaluation of esophageal cancer.