Computertomography-based prediction of complete response following neoadjuvant chemoradiotherapy of locally advanced rectal cancer
- Therapeutic strategies for patients with locally advanced rectal cancer (LARC) who are achieving a pathological complete response (pCR) after neoadjuvant radio-chemotherapy (neoCRT) are being increasingly investigated. Recent trials challenge the current standard therapy of total mesorectal excision (TME). For some patients, the treatment strategy of "watch-and-wait" seems a preferable procedure. The key factor in determining individual treatment strategies following neoCRT is the precise evaluation of the tumor response. Contrast-enhanced computer tomography (ceCT) has proven its ability to discriminate benign and malign lesions in multiple cancers. In this study, we retrospectively analyzed the ceCT based density of LARC in 30 patients, undergoing neoCRT followed by TME. We compared the tumors´ pre- and post-neoCRT density and correlated the results to the amount of residual vital tumor cells in the resected tissue. Overall, the density decreased after neoCRT, with the highest decrease in patients achieving pCR. Densitometry demonstrated a specificity of 88% and sensitivity of 68% in predicting pCR. Thus, we claim that ceCT based densitometry is a useful tool in identifying patients with LARC who may benefit from a "watch-and-wait" strategy and suggest further prospective studies.
Author: | Marina MaslovaGND, Heinz HerdenGND, Karin SchorkORCiDGND, Michael Andreas TurewiczORCiDGND, Martin EisenacherORCiDGND, Roland SchroersORCiDGND, Alexander BaraniskinGND, Thomas MikaORCiDGND |
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URN: | urn:nbn:de:hbz:294-83421 |
DOI: | https://doi.org/10.3389/fonc.2021.623144 |
Parent Title (English): | Frontiers in oncology |
Publisher: | Frontiers Media |
Place of publication: | Lausanne |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2021/09/16 |
Date of first Publication: | 2021/05/31 |
Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
Tag: | Open Access Fonds computer tomography; locally advanced rectal cancer; neoadjuvant chemoradiotherapy; pathologic complete response; predictive mode; watch and wait |
Volume: | 11 |
Issue: | Article 623144 |
First Page: | 623144-1 |
Last Page: | 623144-8 |
Note: | Article Processing Charge funded by the Open Access Publication Fund of Ruhr-Universität Bochum. |
Institutes/Facilities: | Medizinisches Proteom-Center |
Knappschaftskrankenhaus Bochum, Institut für Diagnostische und Interventionelle Radiologie, Neuroradiologie und Nuklearmedizin | |
open_access (DINI-Set): | open_access |
Licence (English): | Creative Commons - CC BY 4.0 - Attribution 4.0 International |