Impact of primary tumour location and RAS/BRAF mutational status in metastatic colorectal cancer treated with first-line regimens containing oxaliplatin and bevacizumab: Prognostic factors from the AIO KRK0207 first-line and maintenance therapy trial

AbstractThe primary tumour location is an important prognostic factor for previously untreated metastatic colorectal cancer (mCRC). However, the predictive efficacies of primary tumour location, early tumour shrinkage (ETS), and depth of response (DpR) on mCRC treatment has not been fully evaluated. This study aimed to investigate the predictive efficacies of these traits in mCRC patients treated with first-line 5-fluorouracil-based chemotherapy plus biologic agents, namely, cetuximab and bevacizumab. This was a retrospective analysis of the medical records of 110 patients with pathology-documented unresectable mCRC. Patients with left-sided mCRC receiving any first-line regimen showed better overall survival (OS) than those with right-sided mCRC [33.3 vs 16.3 months; hazard ratio (HR) 0.44; 95% confidence interval (CI) 0.27–0.74; p < 0.001]. In patients with left-sided tumours, treatment with chemotherapy plus cetuximab yielded longer OS than chemotherapy plus bevacizumab (50.6 vs 27.8 months, HR 0.55; 95% CI 0.32–0.97; p = 0.0378). mCRC patients with ETS and high DpR showed better OS than those lacking ETS and with low DpR (33.5 vs 19.6 months, HR 0.50, 95% CI 0.32–0.79, p = 0.023 and 38.3 vs 19.0 months, HR 0.43, 95% CI 0.28–0.68, p < 0.001, respectively). Moreover, ETS and/or high DpR achieved in patients with right-sided mCRC receiving chemotherapy plus cetuximab were associated with significantly better OS than in those lacking ETS and with low DpR (34.3 vs 10.4 months, HR 0.19, 95% CI 0.04–0.94, p = 0.025 and 34.3 vs 10.4 months, HR 0.19, 95% CI 0.04–0.94, p = 0.0257, respectively). Taken together, our study demonstrates that primary tumour location is not only a well-known prognostic factor but also a relevant predictive factor in patients with mCRC receiving chemotherapy plus cetuximab. Additionally, both ETS and DpR could predict treatment outcomes and also potentially guide cetuximab treatment even in right-sided mCRCs.

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Impact of primary tumour location on survival in patients with metastatic colorectal cancer receiving selective internal radiation therapy and chemotherapy as first-line therapy

Annals of Oncology ◽

10.1093/annonc/mdx302.005 ◽

2017 ◽

Vol 28 ◽

pp. iii152 ◽

Cited By ~ 3

Author(s):

Guy van Hazel ◽

Volker Heinemann ◽

Navesh Sharma ◽

Julien Taieb ◽

Jens Ricke ◽

...

Keyword(s):

Colorectal Cancer ◽

Radiation Therapy ◽

Metastatic Colorectal Cancer ◽

Primary Tumour ◽

Selective Internal Radiation Therapy ◽

First Line ◽

Internal Radiation ◽

First Line Therapy ◽

Line Therapy ◽

Tumour Location

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Impact of primary tumour location on response and resection outcomes in patients with metastatic colorectal cancer (mCRC) undergoing first-line treatment

Annals of Oncology ◽

10.1093/annonc/mdx261.318 ◽

2017 ◽

Vol 28 ◽

pp. iii113-iii114 ◽

Cited By ~ 2

Author(s):

Marc Peeters ◽

Timothy Price ◽

Julien Taieb ◽

Michael Geissler ◽

Fernando Rivera ◽

...

Keyword(s):

Colorectal Cancer ◽

Metastatic Colorectal Cancer ◽

Primary Tumour ◽

Line Treatment ◽

First Line ◽

Tumour Location ◽

First Line Treatment

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Evidence-Based Second-Line Treatment in RAS Wild-Type/Mutated Metastatic Colorectal Cancer in the Precision Medicine Era

International Journal of Molecular Sciences ◽

10.3390/ijms22147717 ◽

2021 ◽

Vol 22 (14) ◽

pp. 7717

Author(s):

Guido Giordano ◽

Pietro Parcesepe ◽

Giuseppina Bruno ◽

Annamaria Piscazzi ◽

Vincenzo Lizzi ◽

...

Keyword(s):

Colorectal Cancer ◽

Metastatic Colorectal Cancer ◽

Checkpoint Inhibitors ◽

Line Treatment ◽

Second Line ◽

Wild Type ◽

First Line ◽

Braf Mutations ◽

Mutational Status ◽

First Line Treatment

Target-oriented agents improve metastatic colorectal cancer (mCRC) survival in combination with chemotherapy. However, the majority of patients experience disease progression after first-line treatment and are eligible for second-line approaches. In such a context, antiangiogenic and anti-Epidermal Growth Factor Receptor (EGFR) agents as well as immune checkpoint inhibitors have been approved as second-line options, and RAS and BRAF mutations and microsatellite status represent the molecular drivers that guide therapeutic choices. Patients harboring K- and N-RAS mutations are not eligible for anti-EGFR treatments, and bevacizumab is the only antiangiogenic agent that improves survival in combination with chemotherapy in first-line, regardless of RAS mutational status. Thus, the choice of an appropriate therapy after the progression to a bevacizumab or an EGFR-based first-line treatment should be evaluated according to the patient and disease characteristics and treatment aims. The continuation of bevacizumab beyond progression or its substitution with another anti-angiogenic agents has been shown to increase survival, whereas anti-EGFR monoclonals represent an option in RAS wild-type patients. In addition, specific molecular subgroups, such as BRAF-mutated and Microsatellite Instability-High (MSI-H) mCRCs represent aggressive malignancies that are poorly responsive to standard therapies and deserve targeted approaches. This review provides a critical overview about the state of the art in mCRC second-line treatment and discusses sequential strategies according to key molecular biomarkers.

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