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Tumor Debulking Fails to Boost Survival in Metastatic CRC
TOPLINE:
In a randomized phase 3 trial, adding tumor debulking to first-line chemotherapy did not significantly improve overall survival or progression-free survival (PFS) and was associated with an increased risk for serious adverse events in patients with multiorgan metastatic colorectal cancer (mCRC). The study found that patients receiving tumor debulking plus chemotherapy and those receiving chemotherapy alone had similar overall survival (median, 30.0 and 27.5 months, respectively) and PFS (median, 10.5 and 10.4 months, respectively).
METHODOLOGY:
- CRC frequently metastasizes, and when the spread is limited, local curative treatments (such as surgery and ablation) yield 5‑year survival rates of 35%-65%. With median overall survival from systemic therapy now exceeding 30 months, local ablative therapies are increasingly combined with systemic treatment for more extensive mCRC; however, randomized trial based-evidence of survival benefits of this approach is lacking.
- Researchers conducted an open-label, multicenter randomized clinical trial, involving 454 patients with multiorgan mCRC, to determine whether reducing the total amount of tumor (referred to as tumor debulking) could improve survival. Only those deemed amenable to at least 80% debulking prior to starting first-line palliative chemotherapy were included.
- A total of 382 patients were randomly assigned 1:1 to receive either chemotherapy alone (n = 192) or tumor debulking followed by chemotherapy (n = 190) after achieving an objective partial or complete response or stable disease following 3 cycles of capecitabine and oxaliplatin or 4 cycles of 5-fluorouracil or leucovorin and oxaliplatin with or without bevacizumab. The chemotherapy alone group continued standard oxaliplatin‑based chemotherapy; in the debulking group, patients with a response received one additional cycle without bevacizumab before local therapy.
- The primary outcome was overall survival, and secondary outcomes included PFS and serious adverse events. The median follow-up duration was 32.3 months.
TAKEAWAY:
- The median overall survival in the chemotherapy alone group vs chemotherapy plus tumor debulking group was 27.5 vs 30.0 months (adjusted hazard ratio [AHR], 0.88; 95% CI, 0.70-1.10; P = .26), indicating no overall survival benefit from adding tumor debulking to first-line palliative chemotherapy.
- The median PFS was also similar between the chemotherapy alone and chemotherapy plus tumor debulking groups (10.4 and 10.5 months, respectively; AHR, 0.83; 95% CI, 0.67-1.02; P = .08). More patients in the combination therapy group vs chemotherapy alone group experienced any serious adverse events of grade 1 or higher (53% vs 39%; P = .006).
- Among patients who achieved a state of stable disease at randomization, a significant overall survival benefit was observed in the intervention group (P for interaction = .04), although no differences in PFS were noted between subgroups (P for interaction = .13).
- Regarding exploratory outcomes, incomplete debulking was associated with much worse survival (median, 16.8 months), whereas maximal (80% or more) and radical debulking were associated with longer median survival (36.6 vs 35.3 months).
- Additionally, fewer patients in the debulking arm completed at least 6 months of chemotherapy (64% vs 77%), and prespecified analyses by BRAF V600E and RAS mutation status did not show a clear overall survival benefit from adding debulking for either mutant or wild‑type tumors.
IN PRACTICE:
“The results of this trial reveal no significant improvement in overall survival or PFS from additional tumor debulking compared with palliative systemic treatment alone in patients with multiorgan mCRC,” the authors of the study wrote, reiterating that “the addition of tumor debulking to palliative chemotherapy should therefore not be considered standard of care” and “use of local therapies for patients with more limited, oligometastatic CRC needs further consideration.”
SOURCE:
The study, led by Elske C. Gootjes, MD, PhD, and Lotte Bakkerus, MD, from the Radboud University Medical Center, Nijmegen, Netherlands, and Anviti A. Adhin, from Erasmus MC Cancer Institute, University Medical Center Rotterdam, Rotterdam, Netherlands, was published online in JAMA.
LIMITATIONS:
Prolonged enrollment could have led to outdated survival estimates and systemic therapy regimens. Additionally, modern systemic chemotherapy regimens such as triplet chemotherapy or chemotherapy plus anti-epidermal growth factor receptor antibodies for left-sided/RAS wild-type tumors were uniformly used.
DISCLOSURES:
The study received funding from the Dutch Cancer Society, the Blokker-Verwer Foundation, and Roche Nederland BV. Some authors reported receiving grants or personal fees or having other ties with various sources. Full disclosures are noted in the original article.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
A version of this article first appeared on Medscape.com.
TOPLINE:
In a randomized phase 3 trial, adding tumor debulking to first-line chemotherapy did not significantly improve overall survival or progression-free survival (PFS) and was associated with an increased risk for serious adverse events in patients with multiorgan metastatic colorectal cancer (mCRC). The study found that patients receiving tumor debulking plus chemotherapy and those receiving chemotherapy alone had similar overall survival (median, 30.0 and 27.5 months, respectively) and PFS (median, 10.5 and 10.4 months, respectively).
METHODOLOGY:
- CRC frequently metastasizes, and when the spread is limited, local curative treatments (such as surgery and ablation) yield 5‑year survival rates of 35%-65%. With median overall survival from systemic therapy now exceeding 30 months, local ablative therapies are increasingly combined with systemic treatment for more extensive mCRC; however, randomized trial based-evidence of survival benefits of this approach is lacking.
- Researchers conducted an open-label, multicenter randomized clinical trial, involving 454 patients with multiorgan mCRC, to determine whether reducing the total amount of tumor (referred to as tumor debulking) could improve survival. Only those deemed amenable to at least 80% debulking prior to starting first-line palliative chemotherapy were included.
- A total of 382 patients were randomly assigned 1:1 to receive either chemotherapy alone (n = 192) or tumor debulking followed by chemotherapy (n = 190) after achieving an objective partial or complete response or stable disease following 3 cycles of capecitabine and oxaliplatin or 4 cycles of 5-fluorouracil or leucovorin and oxaliplatin with or without bevacizumab. The chemotherapy alone group continued standard oxaliplatin‑based chemotherapy; in the debulking group, patients with a response received one additional cycle without bevacizumab before local therapy.
- The primary outcome was overall survival, and secondary outcomes included PFS and serious adverse events. The median follow-up duration was 32.3 months.
TAKEAWAY:
- The median overall survival in the chemotherapy alone group vs chemotherapy plus tumor debulking group was 27.5 vs 30.0 months (adjusted hazard ratio [AHR], 0.88; 95% CI, 0.70-1.10; P = .26), indicating no overall survival benefit from adding tumor debulking to first-line palliative chemotherapy.
- The median PFS was also similar between the chemotherapy alone and chemotherapy plus tumor debulking groups (10.4 and 10.5 months, respectively; AHR, 0.83; 95% CI, 0.67-1.02; P = .08). More patients in the combination therapy group vs chemotherapy alone group experienced any serious adverse events of grade 1 or higher (53% vs 39%; P = .006).
- Among patients who achieved a state of stable disease at randomization, a significant overall survival benefit was observed in the intervention group (P for interaction = .04), although no differences in PFS were noted between subgroups (P for interaction = .13).
- Regarding exploratory outcomes, incomplete debulking was associated with much worse survival (median, 16.8 months), whereas maximal (80% or more) and radical debulking were associated with longer median survival (36.6 vs 35.3 months).
- Additionally, fewer patients in the debulking arm completed at least 6 months of chemotherapy (64% vs 77%), and prespecified analyses by BRAF V600E and RAS mutation status did not show a clear overall survival benefit from adding debulking for either mutant or wild‑type tumors.
IN PRACTICE:
“The results of this trial reveal no significant improvement in overall survival or PFS from additional tumor debulking compared with palliative systemic treatment alone in patients with multiorgan mCRC,” the authors of the study wrote, reiterating that “the addition of tumor debulking to palliative chemotherapy should therefore not be considered standard of care” and “use of local therapies for patients with more limited, oligometastatic CRC needs further consideration.”
SOURCE:
The study, led by Elske C. Gootjes, MD, PhD, and Lotte Bakkerus, MD, from the Radboud University Medical Center, Nijmegen, Netherlands, and Anviti A. Adhin, from Erasmus MC Cancer Institute, University Medical Center Rotterdam, Rotterdam, Netherlands, was published online in JAMA.
LIMITATIONS:
Prolonged enrollment could have led to outdated survival estimates and systemic therapy regimens. Additionally, modern systemic chemotherapy regimens such as triplet chemotherapy or chemotherapy plus anti-epidermal growth factor receptor antibodies for left-sided/RAS wild-type tumors were uniformly used.
DISCLOSURES:
The study received funding from the Dutch Cancer Society, the Blokker-Verwer Foundation, and Roche Nederland BV. Some authors reported receiving grants or personal fees or having other ties with various sources. Full disclosures are noted in the original article.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
A version of this article first appeared on Medscape.com.
TOPLINE:
In a randomized phase 3 trial, adding tumor debulking to first-line chemotherapy did not significantly improve overall survival or progression-free survival (PFS) and was associated with an increased risk for serious adverse events in patients with multiorgan metastatic colorectal cancer (mCRC). The study found that patients receiving tumor debulking plus chemotherapy and those receiving chemotherapy alone had similar overall survival (median, 30.0 and 27.5 months, respectively) and PFS (median, 10.5 and 10.4 months, respectively).
METHODOLOGY:
- CRC frequently metastasizes, and when the spread is limited, local curative treatments (such as surgery and ablation) yield 5‑year survival rates of 35%-65%. With median overall survival from systemic therapy now exceeding 30 months, local ablative therapies are increasingly combined with systemic treatment for more extensive mCRC; however, randomized trial based-evidence of survival benefits of this approach is lacking.
- Researchers conducted an open-label, multicenter randomized clinical trial, involving 454 patients with multiorgan mCRC, to determine whether reducing the total amount of tumor (referred to as tumor debulking) could improve survival. Only those deemed amenable to at least 80% debulking prior to starting first-line palliative chemotherapy were included.
- A total of 382 patients were randomly assigned 1:1 to receive either chemotherapy alone (n = 192) or tumor debulking followed by chemotherapy (n = 190) after achieving an objective partial or complete response or stable disease following 3 cycles of capecitabine and oxaliplatin or 4 cycles of 5-fluorouracil or leucovorin and oxaliplatin with or without bevacizumab. The chemotherapy alone group continued standard oxaliplatin‑based chemotherapy; in the debulking group, patients with a response received one additional cycle without bevacizumab before local therapy.
- The primary outcome was overall survival, and secondary outcomes included PFS and serious adverse events. The median follow-up duration was 32.3 months.
TAKEAWAY:
- The median overall survival in the chemotherapy alone group vs chemotherapy plus tumor debulking group was 27.5 vs 30.0 months (adjusted hazard ratio [AHR], 0.88; 95% CI, 0.70-1.10; P = .26), indicating no overall survival benefit from adding tumor debulking to first-line palliative chemotherapy.
- The median PFS was also similar between the chemotherapy alone and chemotherapy plus tumor debulking groups (10.4 and 10.5 months, respectively; AHR, 0.83; 95% CI, 0.67-1.02; P = .08). More patients in the combination therapy group vs chemotherapy alone group experienced any serious adverse events of grade 1 or higher (53% vs 39%; P = .006).
- Among patients who achieved a state of stable disease at randomization, a significant overall survival benefit was observed in the intervention group (P for interaction = .04), although no differences in PFS were noted between subgroups (P for interaction = .13).
- Regarding exploratory outcomes, incomplete debulking was associated with much worse survival (median, 16.8 months), whereas maximal (80% or more) and radical debulking were associated with longer median survival (36.6 vs 35.3 months).
- Additionally, fewer patients in the debulking arm completed at least 6 months of chemotherapy (64% vs 77%), and prespecified analyses by BRAF V600E and RAS mutation status did not show a clear overall survival benefit from adding debulking for either mutant or wild‑type tumors.
IN PRACTICE:
“The results of this trial reveal no significant improvement in overall survival or PFS from additional tumor debulking compared with palliative systemic treatment alone in patients with multiorgan mCRC,” the authors of the study wrote, reiterating that “the addition of tumor debulking to palliative chemotherapy should therefore not be considered standard of care” and “use of local therapies for patients with more limited, oligometastatic CRC needs further consideration.”
SOURCE:
The study, led by Elske C. Gootjes, MD, PhD, and Lotte Bakkerus, MD, from the Radboud University Medical Center, Nijmegen, Netherlands, and Anviti A. Adhin, from Erasmus MC Cancer Institute, University Medical Center Rotterdam, Rotterdam, Netherlands, was published online in JAMA.
LIMITATIONS:
Prolonged enrollment could have led to outdated survival estimates and systemic therapy regimens. Additionally, modern systemic chemotherapy regimens such as triplet chemotherapy or chemotherapy plus anti-epidermal growth factor receptor antibodies for left-sided/RAS wild-type tumors were uniformly used.
DISCLOSURES:
The study received funding from the Dutch Cancer Society, the Blokker-Verwer Foundation, and Roche Nederland BV. Some authors reported receiving grants or personal fees or having other ties with various sources. Full disclosures are noted in the original article.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
A version of this article first appeared on Medscape.com.
Tumor Debulking Fails to Boost Survival in Metastatic CRC
Tumor Debulking Fails to Boost Survival in Metastatic CRC