Stinchcombe, Thomas E

AbstractBackgroundCALGB 30610 trial demonstrated that once daily thoracic radiotherapy (TRT) was not superior compared to standard twice daily TRT, in patients with limited stage small cell lung cancer. Quality of life outcomes may help oncologists decide the best treatment approach.MethodsA total of 417 patients on CALGB 30610 participated in the quality‐of‐life substudy (CALGB 70702), which included the FACT Trial Outcome Index‐Lung Cancer (FACT‐L TOI), FACT‐Esophageal Cancer (FACT‐E) Eating and Swallowing Indices, ECOG Acute Esophagitis Scale, Hospital Anxiety and Depression Scale (HADS), difficulty swallowing, EQ‐5D, and treatment convenience assessment at baseline, 3, 5, 7, 12, 26, and 52 weeks after starting TRT. Primary end points included FACT‐L TOI and FACT‐E at 12 weeks. Mean changes from baseline were compared between arms using general linear mixed models.ResultsFACT‐L worsening was more in the twice daily arm at week 3 (–1.0 vs. –7.0). FACT‐L TOI worsening was less at week 3 (–2.9 vs. –7.6) and greater at week 12 (–7.6 vs. –2.8) in the once daily arm. The once daily arm had a lower EQ‐5D index worsening at 3 weeks (0.01 vs. –0.02). Increase in acute esophagitis score (1.06 vs. 2.89; p < .001) and difficulty swallowing (0.39 vs. 1.14) were greater in the twice daily arm at week 3. A total of 74.5% of patients on the once daily arm felt that treatment was convenient, compared to 67% of patients in the twice daily arm (p = .03).ConclusionsThe once daily arm had better quality‐of‐life scores earlier during treatment and was perceived to be more convenient.

PURPOSE To evaluate the efficacy and safety of tucatinib and trastuzumab in patients with previously treated human epidermal growth factor receptor 2–positive (HER2+) metastatic biliary tract cancer (mBTC). METHODS SGNTUC-019 (ClinicalTrials.gov identifier: NCT04579380 ) is an open-label phase II basket study evaluating the efficacy and safety of tucatinib and trastuzumab in patients with HER2-altered solid tumors. In the biliary tract cancer cohort, patients had previously treated HER2 overexpressing or amplified (HER2+) tumors (identified with local testing) with no prior HER2-directed therapy. The primary end point was confirmed objective response rate (cORR) per investigator assessment. Patients were treated on a 21-day cycle with tucatinib (300 mg orally twice daily) and trastuzumab (8 mg/kg intravenously followed by 6 mg/kg every 3 weeks). RESULTS Thirty patients were enrolled. As of data cutoff (January 30, 2023), the median duration of follow-up was 10.8 months. The cORR was 46.7% (90% CI, 30.8 to 63.0), with a disease control rate of 76.7% (90% CI, 60.6 to 88.5). The median duration of response and progression-free survival were 6.0 months (90% CI, 5.5 to 6.9) and 5.5 months (90% CI, 3.9 to 8.1), respectively. At data cutoff, 15 patients (50.0%) had died, and the estimated 12-month overall survival rate was 53.6% (90% CI, 36.8 to 67.8). The two most common treatment-emergent adverse events (TEAEs) were pyrexia (43.3%) and diarrhea (40.0%). Grade ≥3 TEAEs were reported in 18 patients (60.0%), with the most common being cholangitis, decreased appetite, and nausea (all 10.0%), which were generally not treatment related. TEAEs led to treatment regimen discontinuation in one patient, and there were no deaths due to TEAEs. CONCLUSION Tucatinib combined with trastuzumab had clinically significant antitumor activity and was well tolerated in patients with previously treated HER2+ mBTC.