PMID- 35070896 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240405 IS - 2227-684X (Print) IS - 2227-8575 (Electronic) IS - 2227-684X (Linking) VI - 10 IP - 12 DP - 2021 Dec TI - Neoadjuvant pyrotinib plus nab-paclitaxel, doxorubicin, and cyclophosphamide for HER2-positive locally advanced breast cancer: a retrospective case-series study. PG - 3362-3368 LID - 10.21037/gs-21-770 [doi] AB - BACKGROUND: The anti-tumor activity of pyrotinib has been confirmed in human epidermal growth factor receptor 2 (HER2)-positive metastatic breast cancer. This study investigated the effect of pyrotinib plus nab-paclitaxel, doxorubicin, and cyclophosphamide as neoadjuvant therapy in patients with HER2-positive locally advanced breast cancer. METHODS: In this single-center retrospective study, female patients with HER2-positive locally advanced breast cancer received pyrotinib 320 mg orally once a day and the TAC regimen (nab-paclitaxel 260 mg/m(2), liposomal doxorubicin 20 mg/m(2), and cyclophosphamide 600 mg/m(2)) on day 1 of each 21-day cycle. Surgery was performed after 4-6 cycles of neoadjuvant therapy. The outcomes included total pathological complete response (tpCR, ypT0/Tis ypN0) rate, objective response rate (ORR) after neoadjuvant therapy, progression-free survival, overall survival, and the incidence of adverse events (AEs). RESULTS: Between March 2019 and January 2020, a total of 22 patients were included. The median age was 48 years (range, 32-60). The ORR was 100% after the completion of neoadjuvant therapy. Ten (45.5%) patients achieved tpCR, including four of ten (40.0%) patients with positive hormone receptor, and six of 12 (50.0%) patients with negative hormone receptor. As at December 2020, no disease recurrence, progression, or death occurred. All patients suffered AEs after neoadjuvant therapy, most of which were grade 1-2. Grade >/=3 AEs included diarrhea [4 (18.2%)], rash [2 (9.1%)], and hand-foot syndrome [1 (4.5%)]. CONCLUSIONS: Neoadjuvant pyrotinib combined with the TAC regimen showed promising clinical benefit in patients with HER2-positive locally advanced breast cancer, with an acceptable safety profile. CI - 2021 Gland Surgery. All rights reserved. FAU - Yao, De-Shun AU - Yao DS AD - Second Department of Breast Surgery, Tangshan People's Hospital, North China University of Science and Technology, Tangshan, China. FAU - Wang, Wei AU - Wang W AD - School of Clinical Medicine, North China University of Science and Technology, Tangshan, China. FAU - Chang, Jin-Yi AU - Chang JY AD - School of Clinical Medicine, North China University of Science and Technology, Tangshan, China. FAU - Zhang, Yang AU - Zhang Y AD - Second Department of Breast Surgery, Tangshan People's Hospital, North China University of Science and Technology, Tangshan, China. FAU - Zhang, Hui-Wen AU - Zhang HW AD - College of Nursing and Rehabilitation, North China University of Science and Technology, Tangshan, China. FAU - Xu, Jin-Xia AU - Xu JX AD - Nuclear Medicine Clinical Laboratory, Tangshan People's Hospital, North China University of Science and Technology, Tangshan, China. FAU - Cai, Hai-Feng AU - Cai HF AD - Second Department of Breast Surgery, Tangshan People's Hospital, North China University of Science and Technology, Tangshan, China. LA - eng PT - Journal Article PL - China (Republic : 1949- ) TA - Gland Surg JT - Gland surgery JID - 101606638 PMC - PMC8749092 OTO - NOTNLM OT - Pyrotinib OT - breast cancer OT - chemotherapy OT - human epidermal growth factor receptor 2 OT - neoadjuvant therapy COIS- Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at http://dx.doi.org/10.21037/gs-21-770). EDAT- 2022/01/25 06:00 MHDA- 2022/01/25 06:01 PMCR- 2021/12/01 CRDT- 2022/01/24 08:54 PHST- 2021/10/29 00:00 [received] PHST- 2021/12/16 00:00 [accepted] PHST- 2022/01/24 08:54 [entrez] PHST- 2022/01/25 06:00 [pubmed] PHST- 2022/01/25 06:01 [medline] PHST- 2021/12/01 00:00 [pmc-release] AID - gs-10-12-3362 [pii] AID - 10.21037/gs-21-770 [doi] PST - ppublish SO - Gland Surg. 2021 Dec;10(12):3362-3368. doi: 10.21037/gs-21-770.