Merck's KEYTRUDA and WELIREG Show Promising Results in Kidney Cancer Treatment
- Clinical Trial Results: At the 2026 American Society of Clinical Oncology (ASCO) meeting, Merck presented results from the LITESPARK-022 Phase 3 trial, demonstrating that the combination of KEYTRUDA and WELIREG significantly improved disease-free survival in renal cell carcinoma patients, reducing the risk of recurrence or death by 28% (HR=0.72, p=0.0003), offering new hope for kidney cancer treatment.
- Significant Patient Benefit: In the first pre-specified interim analysis with a median follow-up of 28.4 months, the 24-month disease-free survival rate was 80.7% for the KEYTRUDA plus WELIREG arm, notably higher than the 73.7% for KEYTRUDA monotherapy, providing a new treatment option for high-risk patients that could reshape clinical practice.
- FDA Priority Review: Following the positive results from LITESPARK-022, the FDA has accepted priority review applications for the combination of WELIREG with KEYTRUDA, with a target action date set for June 19, 2026, which could provide more effective treatment options for kidney cancer patients if approved.
- Good Safety Profile: The safety profile of the KEYTRUDA and WELIREG combination was consistent with previously reported studies, with no new safety signals observed, and 69.5% of patients completing the treatment, indicating good tolerability and enhancing its potential for clinical application.
Trade with 70% Backtested Accuracy
Analyst Views on MRK
About MRK
About the author


Merck & Co. Announcement: Merck & Co. has set a new date of June 19, 2026, for the FDA's decision regarding the approval of its drug, Welireg.
Key Drug Focus: The drug Welireg is significant for its potential impact on treatment options, particularly in the context of key health conditions.

- Merck & Co. Update: Merck & Co. has received priority review from the FDA for its combination treatment involving Welireg and Keytruda.
- Regulatory Milestone: The FDA's acceptance of the priority review signifies a potential advancement in treatment options for patients.

Key Findings: The combination of Keytruda (pembrolizumab) and Welireg (belzutifan) has been shown to reduce the risk of disease recurrence or death by 28% compared to Keytruda alone in certain patients.
Target Patient Group: This treatment is particularly effective for patients with early-stage renal cell carcinoma (RCC).

FDA Review: The FDA has accepted a review of two supplemental applications from Merck & Co. for their product, Welireg.
Product Focus: The review pertains specifically to the use of Welireg in treating certain conditions, highlighting its potential benefits in the medical field.

- Significant Improvement: Merck & Co's Lenviima shows notable progress in free survival rates for patients.
- Clinical Advancements: The findings indicate a substantial enhancement in treatment outcomes for those undergoing therapy.

Merck & Co. Announcement: Merck & Co. has reported that its drug, Lenviima, significantly reduces the risk of disease progression.
Efficacy Rate: The treatment is shown to lower the risk of disease progression by 30%, indicating a promising advancement in patient care.





