The reduction of F-18-FDG uptake ability of tumor tissue after neoadjuvant chemoradiotherapy in locally advanced rectal cancer can effectively reflect the degree of tumor regression
机构：[1]Hebei Med Univ, Dept Radiat Oncol, Hosp 4, Shijiazhuang, Peoples R China河北医科大学第四医院[2]Chinese Acad Med Sci, Dept Radiat Oncol, Hebei Canc Hosp, Langfang, Peoples R China河北医科大学第四医院[3]Hebei Univ,Dept Med Oncol,Affiliated Hosp,Baoding,Peoples R China医疗肿瘤内科河北大学附属医院重点学科肿瘤内科[4]Hebei Med Univ, Dept Gen Surg, Hosp 4, Shijiazhuang, Peoples R China河北医科大学第四医院[5]Hebei Med Univ, Dept Nucl Med, Hosp 4, Shijiazhuang, Peoples R China河北医科大学第四医院[6]Hebei Med Univ, Dept Gen Surg, Hosp 2, Shijiazhuang, Peoples R China
IntroductionTo evaluate the predictive value of F-18-fluorodeoxyglucose positron emission tomography-computed tomography (F-18-FDG PET-CT) imaging parameters for the response to neoadjuvant chemoradiotherapy (nCRT) in locally advanced rectal cancer (LARC). MethodsFrom January 2016 to March 2020, 52 LARC patients who underwent F-18-FDG PET-CT scans within 1 week before and 8-9 weeks after nCRT, were enrolled in this study according to a pre-designed screening criteria. After total mesorectal excision (TME) surgery, we assessed tumor response to treatment and analyzed the correlation between imaging parameters obtained from two PET-CT scans and tumor regression status. ResultsTumor response assessment showed that 13 of 52 patients received good response (GR), including 9 cases with pathological complete regression (pCR) and 4 cases with near-pathological complete regression (near-pCR). We also found that the maximum standard uptake value after nCRT (post-SUVmax), the response index (RI), the mean standard uptake values after nCRT (post-SUVmean), and the ratio of tumor SUVmean to liver SUVmean after nCRT (post-Ratio), were correlated with GR and pCR. Among these parameters, post-SUVmax and RI had a near-strong correlation with pCR (r(s)= -0.58 and 0.59, respectively), and also had a strong correlation with GR (r(s) = -0.7 and 0.63, respectively). Further ROC analysis showed that post-SUVmax and RI had higher values in predicting whether patients could achieve GR and pCR after nCRT, and the area under the curve (AUC) of both were greater than 0.9. The positive predictive values (PPVs) and negative predictive values (NPVs) of post-SUVmax for GR were 80.01% and 97.3%, and for pCR were 66.68% and 97.5%, respectively. The PPVs and NPVs of the RI values for GR were 84.61% and 94.87%, and for pCR were 69.24% and 100%, respectively. ConclusionFor LARC patients, the analysis of imaging parameters such as post-SUVmax and RI, which can reflect the changes of F-18-FDG uptake capacity of tumor tissues before and after nCRT, is of great value for predicting the response of patients to neoadjuvant therapy and guiding the selection of subsequent treatment strategies.
基金：
Hebei Provincial Department of Bureau of Science and Technology; [22377733D]
第一作者机构：[1]Hebei Med Univ, Dept Radiat Oncol, Hosp 4, Shijiazhuang, Peoples R China
共同第一作者：
通讯作者：
通讯机构：[2]Chinese Acad Med Sci, Dept Radiat Oncol, Hebei Canc Hosp, Langfang, Peoples R China[6]Hebei Med Univ, Dept Gen Surg, Hosp 2, Shijiazhuang, Peoples R China
推荐引用方式(GB/T 7714)：
Wu Fengpeng,Zhang Xiaoxiao,Yang Congrong,et al.The reduction of F-18-FDG uptake ability of tumor tissue after neoadjuvant chemoradiotherapy in locally advanced rectal cancer can effectively reflect the degree of tumor regression[J].FRONTIERS IN ONCOLOGY.2022,12:doi:10.3389/fonc.2022.1037783.
APA：
Wu, Fengpeng,Zhang, Xiaoxiao,Yang, Congrong,Wang, Kanghua,Xiao, Linlin...&Wang, Guiying.(2022).The reduction of F-18-FDG uptake ability of tumor tissue after neoadjuvant chemoradiotherapy in locally advanced rectal cancer can effectively reflect the degree of tumor regression.FRONTIERS IN ONCOLOGY,12,
MLA：
Wu, Fengpeng,et al."The reduction of F-18-FDG uptake ability of tumor tissue after neoadjuvant chemoradiotherapy in locally advanced rectal cancer can effectively reflect the degree of tumor regression".FRONTIERS IN ONCOLOGY 12.(2022)
