Chemotherapy-free regimen of tucatinib and trastuzumab shows anti-tumour activity with durable responses in patients with HER2-mutated metastatic breast cancer

 Results of the open-label phase II trial, SGNTUC-019, "evaluating tucatinib in combination with trastuzumab" in patients with HER2-mutated metastatic breast cancer, showed that this form of treatment was well tolerated with diarrhea noted as the most common adverse event.  In addition, study authors noted that most events had a grade 1 severity, which were managed with standard clinical care; grade 3 occurrence was noted in 13% of cases.  

To learn more about this study, click here. 

Source mentioned: 

Okines AFC, Curigliano G, Mizuno N, et al. Tucatinib and trastuzumab in HER2-mutated metastatic breast cancer: a phase 2 basket trial. Nature Medicine; Published online 17 January 2025. DOI: https://doi.org/10.1038/s41591-024-03462-0

Active monitoring promising for women with low-risk ductal carcinoma in situ

Results of the intention-to-treat analysis from the COMET study, "a prospective randomized, pragmatic non-inferiority trial..." for women with low-risk ductal carcinoma in situ (DCIS) was recently presented at the San Antonio Breast Cancer Symposium.  Conducted on 995 women 40 years or older with a new diagnosis of hormone receptor-positive grade 1 or grade 2 DCIS without invasive cancer, the COMET study supports the notion that a "standard management strategy for low-risk DCIS requires longer follow-up for most patients."   

To learn more about the COMET study, click here. 

Sources mentioned: 

• Hwang ES, Hyslop T, Lynch T, et al. for the COMET Study Investigators. Active Monitoring With or Without Endocrine Therapy for Low-Risk Ductal Carcinoma In Situ The COMET Randomized Clinical Trial. JAMA; Published online 12 December 2024. doi: 10.1001/jama.2024.26698
• 
  
• Morrow M, Barrio AV. Is It Time to Abandon Surgery for Low-Risk DCIS? JAMA; Published online 12 December 2024. doi:10.1001/jama.2024.26723