Immunomedics, Inc. announced that results from the confirmatory Phase 3 ASCENT study showed that Trodelvy (sacituzumab govitecan-hziy) significantly extended overall survival (OS) and improved overall response rate (ORR) and clinical benefit rate (CBR), compared to treatment of choice (TPC) standard single-agent chemotherapy in brain metastases-negative patients with mTNBC who had previously received at least two prior therapies for metastatic disease. These results will be presented as a late-breaking abstract (Abstract# LBA17) at the European Society for Medical Oncology (ESMO) Virtual Congress 2020. Despite having received a median of four prior anticancer regimens, patients treated with Trodelvy in the ASCENT study showed a statistically significant and clinically meaningful improvement in OS with a median of 12.1 months (95% confidence interval (CI), 10.7-14.0) versus 6.7 months (95% CI, 5.8-7.7) for chemotherapy, with a hazard ratio of 0.48 (95% CI, 0.38-0.59; p<0.0001). Trodelvy also demonstrated a statistically significant improvement in ORR (35%) and CBR (45%) compared to chemotherapy (5% and 9%, respectively). Ten complete responses were observed (4%) in the Trodelvy arm compared with two (1%) in the control group. As of data cutoff on March 11, 2020, 15 patients continued to receive Trodelvy treatment while no patient remained on study in the TPC control arm. Trodelvy was well tolerated by patients in the ASCENT study, with a manageable safety profile consistent with the U.S. Food and Drug Administration (FDA)-approved label; no new safety signals were observed in the ASCENT study. Adverse events leading to treatment discontinuation were low and similar (Trodelvy 4.7% vs TPC 5.4%) in both arms of the study. Trodelvy was approved as a third-line treatment for adult patients with mTNBC under the FDA’s Accelerated Approval Program and carries a black box warning for severe neutropenia and severe diarrhea. The most common adverse reactions occurring in 25 or more % of patients included nausea, neutropenia, diarrhea, fatigue, anemia, vomiting, alopecia, constipation, decreased appetite, rash and abdominal pain. The most common Grade 3 or 4 adverse events occurring in more than 5% of patients were neutropenia, white blood cell count decreased, anemia, hypophosphatemia, diarrhea, fatigue, nausea and vomiting. 2% of patients discontinued treatment due to adverse events. There were no deaths related to treatment and no severe cases of neuropathy or interstitial lung disease.