Computed tomography with histological correlation for evaluating tumor regression of rectal carcinoma after preoperative chemoradiation therapy

研究成果: Article

5 引文 (Scopus)

摘要

Background/Aims: Preoperative chemoradiation therapy (CRT) is standard procedure for locally advanced rectal cancer. The correlation of tumor response evaluated using CT according to response evaluation criteria in solid tumors (RECIST) with the histological tumor regression grade (TRG) is not well-documented. Methodology: Ninety-one patients with rectal cancer underwent CT examinations before and after preoperative CRT and following surgery. Clinical tumor staging and tumor response assessed according to RECIST were done on paired CT scans. Pathological tumor staging and TRGs were reviewed in resected specimens. Post-CRT CT findings and histological findings were compared. Survival analysis for 73 patients was done. Results: TRG was positively correlated with the CT-assessed tumor response (τ=0.276, p=0.009). Thickened fibrotic areas and muscle disarray caused by fibrosis were more frequently seen in cases of patients over-diagnosed as having residual tumors. The ycT status was positively correlated with ypT status (r=0.44, p<0.001; accuracy=61.5%). Downstaging of cT status was correlated with a lower TRG (p=0.001). Conclusions: Fibrosis emerges after neoadjuvant therapy and is usually accompanied by tumor reduction on CT scans of rectal cancer patients following preoperative CRT. Therefore, tumor response assessed using CT according to RECIST may serve as a supplementary tool for preoperative planning other than tumor restaging.

原文English
頁(從 - 到)2484-2489
頁數6
期刊Hepato-Gastroenterology
59
發行號120
DOIs
出版狀態Published - 2012 十一月 1

指紋

Rectal Neoplasms
Tomography
Carcinoma
Neoplasms
Therapeutics
Neoplasm Staging
Fibrosis
Neoadjuvant Therapy
Residual Neoplasm
Survival Analysis
Muscles

All Science Journal Classification (ASJC) codes

  • Hepatology
  • Gastroenterology

引用此文

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title = "Computed tomography with histological correlation for evaluating tumor regression of rectal carcinoma after preoperative chemoradiation therapy",
abstract = "Background/Aims: Preoperative chemoradiation therapy (CRT) is standard procedure for locally advanced rectal cancer. The correlation of tumor response evaluated using CT according to response evaluation criteria in solid tumors (RECIST) with the histological tumor regression grade (TRG) is not well-documented. Methodology: Ninety-one patients with rectal cancer underwent CT examinations before and after preoperative CRT and following surgery. Clinical tumor staging and tumor response assessed according to RECIST were done on paired CT scans. Pathological tumor staging and TRGs were reviewed in resected specimens. Post-CRT CT findings and histological findings were compared. Survival analysis for 73 patients was done. Results: TRG was positively correlated with the CT-assessed tumor response (τ=0.276, p=0.009). Thickened fibrotic areas and muscle disarray caused by fibrosis were more frequently seen in cases of patients over-diagnosed as having residual tumors. The ycT status was positively correlated with ypT status (r=0.44, p<0.001; accuracy=61.5{\%}). Downstaging of cT status was correlated with a lower TRG (p=0.001). Conclusions: Fibrosis emerges after neoadjuvant therapy and is usually accompanied by tumor reduction on CT scans of rectal cancer patients following preoperative CRT. Therefore, tumor response assessed using CT according to RECIST may serve as a supplementary tool for preoperative planning other than tumor restaging.",
author = "Chung-Ta Lee and Nan-Haw Chow and Yi-Sheng Liu and Shao-Chieh Lin and Peng-Chan Lin and Yuan-Hua Wu and Jenq-Chang Lee and Hong-Ming Tsai",
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T1 - Computed tomography with histological correlation for evaluating tumor regression of rectal carcinoma after preoperative chemoradiation therapy

AU - Lee, Chung-Ta

AU - Chow, Nan-Haw

AU - Liu, Yi-Sheng

AU - Lin, Shao-Chieh

AU - Lin, Peng-Chan

AU - Wu, Yuan-Hua

AU - Lee, Jenq-Chang

AU - Tsai, Hong-Ming

PY - 2012/11/1

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N2 - Background/Aims: Preoperative chemoradiation therapy (CRT) is standard procedure for locally advanced rectal cancer. The correlation of tumor response evaluated using CT according to response evaluation criteria in solid tumors (RECIST) with the histological tumor regression grade (TRG) is not well-documented. Methodology: Ninety-one patients with rectal cancer underwent CT examinations before and after preoperative CRT and following surgery. Clinical tumor staging and tumor response assessed according to RECIST were done on paired CT scans. Pathological tumor staging and TRGs were reviewed in resected specimens. Post-CRT CT findings and histological findings were compared. Survival analysis for 73 patients was done. Results: TRG was positively correlated with the CT-assessed tumor response (τ=0.276, p=0.009). Thickened fibrotic areas and muscle disarray caused by fibrosis were more frequently seen in cases of patients over-diagnosed as having residual tumors. The ycT status was positively correlated with ypT status (r=0.44, p<0.001; accuracy=61.5%). Downstaging of cT status was correlated with a lower TRG (p=0.001). Conclusions: Fibrosis emerges after neoadjuvant therapy and is usually accompanied by tumor reduction on CT scans of rectal cancer patients following preoperative CRT. Therefore, tumor response assessed using CT according to RECIST may serve as a supplementary tool for preoperative planning other than tumor restaging.

AB - Background/Aims: Preoperative chemoradiation therapy (CRT) is standard procedure for locally advanced rectal cancer. The correlation of tumor response evaluated using CT according to response evaluation criteria in solid tumors (RECIST) with the histological tumor regression grade (TRG) is not well-documented. Methodology: Ninety-one patients with rectal cancer underwent CT examinations before and after preoperative CRT and following surgery. Clinical tumor staging and tumor response assessed according to RECIST were done on paired CT scans. Pathological tumor staging and TRGs were reviewed in resected specimens. Post-CRT CT findings and histological findings were compared. Survival analysis for 73 patients was done. Results: TRG was positively correlated with the CT-assessed tumor response (τ=0.276, p=0.009). Thickened fibrotic areas and muscle disarray caused by fibrosis were more frequently seen in cases of patients over-diagnosed as having residual tumors. The ycT status was positively correlated with ypT status (r=0.44, p<0.001; accuracy=61.5%). Downstaging of cT status was correlated with a lower TRG (p=0.001). Conclusions: Fibrosis emerges after neoadjuvant therapy and is usually accompanied by tumor reduction on CT scans of rectal cancer patients following preoperative CRT. Therefore, tumor response assessed using CT according to RECIST may serve as a supplementary tool for preoperative planning other than tumor restaging.

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