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Carboplatin addition to standard chemotherapy improves event-free survival in early-stage triple-negative breast cancerAdding carboplatin improves survival for triple-negative breast cancer

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Key Takeaway
Consider adding carboplatin to standard chemotherapy to improve event-free survival in early-stage triple-negative breast cancer.

The trial investigated the efficacy and safety of adding carboplatin to a standard chemotherapy regimen consisting of doxorubicin and cyclophosphamide followed by a taxane. The study focused on patients diagnosed with stage II or III triple-negative breast cancer. The primary endpoint was event-free survival, while secondary outcomes included overall survival, invasive disease-free survival, distant recurrence-free survival, and pathologic complete response rates.

Results indicated that the addition of carboplatin significantly improved event-free survival compared to the control group. While secondary outcomes such as overall survival and distant recurrence-free survival showed directionally consistent trends favoring the carboplatin arm, these specific measures did not reach statistical significance. Regarding safety, the carboplatin arm was associated with more frequent grade 3 or higher treatment-related adverse events, although no clinically meaningful deterioration in quality of life was reported.

Clinicians may consider the addition of carboplatin as a strategy to improve event-free survival in early-stage triple-negative breast cancer. However, the increased frequency of higher-grade adverse events in the carboplatin arm should be balanced against the survival benefits. The trial provides high certainty for the primary outcome due to its phase III design.

Living with triple-negative breast cancer brings unique challenges because it is often aggressive and harder to treat with standard methods. A large study of 868 patients with early-stage cancer looked at a way to improve outcomes by adding a specific drug called carboplatin to the standard chemotherapy routine.

The trial found that patients who received carboplatin along with doxorubicin, cyclophosphamide, and a taxane had better event-free survival. This means the patients stayed cancer-free for longer periods compared to those on the standard treatment. Specifically, the five-year event-free survival rate rose from 75.1% to 82.3% in the group that received the extra medication.

While the treatment was more effective, it did come with more frequent severe side effects. About 74.7% of patients in the carboplatin group experienced high-grade treatment-related issues, compared to 56.7% in the standard group. However, doctors did not see a significant drop in the patients' daily quality of life. Other measures like overall survival showed positive trends but did not reach the level of statistical certainty needed to confirm a definitive difference.

What this means for you:
Adding carboplatin to standard chemotherapy improves the rate of staying cancer-free for triple-negative breast cancer.

Common questions

Does adding carboplatin help patients with triple-negative breast cancer?

Yes, the study found that adding carboplatin to the standard chemotherapy of doxorubicin, cyclophosphamide, and a taxane significantly improved event-free survival. In this trial, the five-year event-free survival rate increased from 75.1% to 82.3% for those who received the carboplatin addition.

Are there side effects to using carboplatin in this treatment?

The study found that more patients in the carboplatin group experienced severe, high-grade side effects (74.7%) compared to the standard group (56.7%). However, the researchers did not find a clinically meaningful drop in the patients' daily quality of life.

How long were the patients followed in this study?

Patients in this trial were followed for an average of 57.2 months. This timeframe allowed researchers to see that the carboplatin group had a higher rate of staying cancer-free over a five-year period.

Study Details

Study typeRct
Sample sizen = 868
EvidenceLevel 2
Follow-up57.2 mo
PublishedOct 2026
View Original Abstract ↓
BACKGROUND: Platinum agents have been shown to increase pathologic complete response (pCR) rates when added to neoadjuvant chemotherapy for triple-negative breast cancer (TNBC). The PEARLY multicenter, randomized, phase III trial investigated the efficacy and safety of adding carboplatin to standard anthracycline-based and taxane chemotherapy for patients with early-stage TNBC in the neoadjuvant or adjuvant settings. PATIENTS AND METHODS: Patients with stage II or III TNBC were enrolled. Patients received either standard therapy with doxorubicin and cyclophosphamide followed by a taxane (control arm) or carboplatin in addition to a taxane following doxorubicin and cyclophosphamide (carboplatin arm). The primary endpoint was event-free survival (EFS). Secondary endpoints included overall survival (OS), invasive disease-free survival (IDFS), distant recurrence-free survival (DRFS), pCR rate, and safety. RESULTS: Between January 2016 and June 2020, 868 patients across 22 institutions in the Republic of Korea were randomly assigned to either the control arm or carboplatin arm. At a median follow-up of 57.2 months, carboplatin significantly improved EFS compared with the control [hazard ratio 0.67, 95% confidence interval (CI) 0.49-0.92, P = 0.012]. The 5-year EFS rates increased from 75.1% to 82.3% with an absolute 7.2% difference. Secondary endpoints, including OS, IDFS, and DRFS, showed directionally consistent trends favoring the carboplatin arm, though none reached statistical significance. Grade 3 or higher treatment-related adverse event rates were more frequent in the carboplatin arm (74.7%) than in the control arm (56.7%), driven primarily by hematologic toxicity. CONCLUSION: The addition of carboplatin to doxorubicin and cyclophosphamide followed by taxane therapy significantly improved EFS in patients with early-stage TNBC. Despite a higher incidence of grade ≥3 adverse events in the carboplatin arm, no clinically meaningful deterioration in quality of life was observed, supporting a favorable risk-benefit profile for carboplatin incorporation into early TNBC treatment.
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