Application value of high resolution magnetic resonance imaging and positron emission tomography and computed tomography in the detection of peripheral metastatic small lymph nodes and preoperative T staging in rectal cancer
QIN Xiaoxue ZHANG Wen GAO Hong HU Yuxia▲
Department of Imaging, Qinhuai Medical District of the Chinese People’s Liberation Army Eastern Theater General Hospital, Jiangsu Province, Nanjing 210000, China
Abstract：Objective To investigate the application value of high resolution magnetic resonance imaging (MRI) and positron emission tomography and computed tomography (PET/CT) in the detection of peripheral metastatic small lymph nodes and preoperative T staging in rectal cancer. Methods The clinical data of 109 patients with rectal cancer admitted to Qinhuai Medical District of the Chinese People’s Liberation Army Eastern Theater General Hospital from August 2019 to December 2021 were retrospectively analyzed. Taking the pathological results as the gold standard, the value of different methods (high resolution MRI and PET/CT examination) in screening peripheral metastatic small lymph nodes and preoperative T staging were analyzed. Results Pathological diagnosis showed that 352 peripheral metastatic small lymph nodes were found in 109 patients with rectal cancer, including 26 cases in T1-T2 staging, 68 cases in T3 stage, and 15 cases in T4 staging. High-resolution MRI was consistent with the gold standard in the diagnosis of peripheral metastatic small lymph nodes and preoperative T1-T2, T3 staging (Kappa=0.565, 0.705, 0.750, P＜0.05), there was no consistency in the diagnosis of preoperative T4 staging (P＞0.05). PET/CT was consistent with the gold standard in the diagnosis of peripheral metastatic small lymph nodes and preoperative T1-T2, T3 staging (Kappa=0.696, 0.590, 0.455, P＜0.05), there was no consistency in the diagnosis of preoperative T4 staging (P＞0.05). The combination of the two methods had strong consistency with the gold standard in the diagnosis of peripheral metastatic small lymph nodes and preoperative T1-T2, T3, T4 stage (Kappa=0.838, 0.808, 0.865, 0.709, P＜0.05). The sensitivity and specificity of high-resolution MRI combined with PET/CT in the screening of small peripheral metastatic lymph nodes and preoperative T staging were higher than 90%. Conclusion High-resolution MRI combined with PET/CT has a high detection rate of peripheral metastatic small lymph nodes around rectal cancer, and the combined examination has a high diagnostic value in preoperative T staging.
秦小雪 张文 高红 胡宇霞▲. 高分辨率磁共振成像与正电子发射计算机体层显像仪在直肠癌周围转移性小淋巴结检出及术前T分期诊断中的应用价值[J]. 中国医药导报, 2023, 20(16): 145-148,153.
QIN Xiaoxue ZHANG Wen GAO Hong HU Yuxia▲. Application value of high resolution magnetic resonance imaging and positron emission tomography and computed tomography in the detection of peripheral metastatic small lymph nodes and preoperative T staging in rectal cancer. 中国医药导报, 2023, 20(16): 145-148,153.
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