MRI-Based Apparent Diffusion Coefficient for Predicting Pathologic Response of Rectal Cancer After Neoadjuvant Therapy: Systematic Review and Meta-Analysis

被引:42
作者
Amodeo, Salvatore [1 ]
Rosman, Alan S. [2 ,3 ]
Desiato, Vincenzo [1 ,4 ]
Hindman, Nicole M. [5 ]
Newman, Elliot [1 ,6 ]
Berman, Russell [1 ]
Pachter, H. Leon [1 ]
Melis, Marcovalerio [1 ,6 ]
机构
[1] NYU, Sch Med, Dept Surg, New York, NY 10016 USA
[2] Mt Sinai Sch Med, Sect Gastroenterol & Med Program, New York, NY USA
[3] James J Peters VA Med Ctr, New York, NY USA
[4] Univ Federico II Naples, Dept Clin Med & Surg, Naples, Italy
[5] NYU, Sch Med, Langone Med Ctr, Dept Radiol, New York, NY USA
[6] New York Harbor Healthcare Syst, Dept Surg, 423 E 23rd St,Rm 4153 N, New York, NY 10010 USA
关键词
apparent diffusion coefficient; DWI; locally advanced rectal cancer; pathologic response; WEIGHTED MAGNETIC-RESONANCE; COMPLETE CLINICAL-RESPONSE; CONTRAST-ENHANCED-MRI; PREOPERATIVE CHEMORADIOTHERAPY; DIAGNOSTIC-TEST; CHEMORADIATION THERAPY; POSTOPERATIVE CHEMORADIOTHERAPY; MESORECTAL EXCISION; RADIATION-THERAPY; TUMOR-REGRESSION;
D O I
10.2214/AJR.17.19135
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
OBJECTIVE. The purpose of this study was to assess the use of apparent diffusion coefficient (ADC) during DWI for predicting complete pathologic response of rectal cancer after neoadjuvant therapy. MATERIALS AND METHODS. A systematic review of available literature was conducted to retrieve studies focused on the identification of complete pathologic response of locally advanced rectal cancer after neoadjuvant chemoradiation, through the assessment of ADC evaluated before, after, or both before and after treatment, as well as in terms of the difference between pretreatment and posttreatment ADC. Pooled mean pretreatment ADC, posttreatment ADC, and Delta-ADC (calculated as posttreatment ADC minus pretreatment ADC divided by pretreatment ADC and multiplied by 100) in complete responders versus incomplete responders were calculated. For each parameter, we also pooled sensitivity and specificity and calculated the area under the summary ROC curve. RESULTS. We found 10 prospective and eight retrospective studies. Overall, pathologic complete response was observed in 22.2% of patients. Pooled mean pretreatment ADC in complete responders was 0.84 x 10(-3) mm(2)/s versus 0.89 x 10(-3) mm(2)/s in incomplete responders (p = 0.33). Posttreatment ADC values were 1.51 x 10-3 mm(2)/s and 1.29 x 10(-3) mm(2)/s, in complete and incomplete responders, respectively (p = 0.00001). The Delta-ADC percentages were also significantly higher in complete responders than in incomplete responders (59.7% vs 29.7%, respectively, p = 0.016). Pooled sensitivity, specificity, and AUC were 0.743, 0.755, and 0.841 for pretreatment ADC; 0.800, 0.737, and 0.782 for posttreatment ADC; and 0.832, 0.806, and 0.895 for Delta-ADC. CONCLUSION. Use of ADC during DWI is a promising technique for assessment of results of neoadjuvant treatment of rectal cancer.
引用
收藏
页码:W205 / W216
页数:12
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