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Neoadjuvant pertuzumab in non-metastatic HER2-positive breast tumors: Multicentric study in Peru (NeoHer)

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dc.contributor.author Falcon, Silvia
dc.contributor.author Riva, Luis
dc.contributor.author Flores, Christina
dc.contributor.author Vera, Delphis
dc.contributor.author Pinto, Joseph A.
dc.contributor.author Gomez, Henry L.
dc.date.accessioned 2022-03-23T16:54:21Z
dc.date.available 2022-03-23T16:54:21Z
dc.date.issued 2022
dc.identifier.uri https://hdl.handle.net/20.500.12866/11487
dc.description.abstract Several clinical trials have demonstrated the benefit of adding pertuzumab to trastuzumab plus neoadjuvant chemotherapy in the treatment of human epidermal growth factor receptor 2 (HER2)-positive breast cancer. The comparison of outcomes between nonrandomized groups of patients who received similar treatments in routine practice remains difficult. The present study aimed to evaluate the pathological complete response (pCR) rates achieved with pertuzumab among patients in routine clinical care in Peru using real-world data. The definition of pCR used was the absence of residual invasive cancer from the complete resected breast specimen and all sampled regional lymph nodes following completion of neoadjuvant systemic therapy. A total of 44 patients with non-metastatic HER2-positive breast cancer (stages II and III) treated with pertuzumab in the neoadjuvant setting and who underwent surgery at three private clinics in Lima (Peru) were retrospectively evaluated. The pCR was the efficacy endpoint and it was determined and compared with the results from other clinical trials. Furthermore, safety data were described. The median age was 44 years (interquartile range, 39.5-50.5 years) and 65.9% of patients were premenopausal. Regarding the clinical stage, 56.8% were IIA/IIB and 36.4% were IIIA/IIIB/IIIC. All treatment schemes included concurrent trastuzumab. The patients' treatment comprised neoadjuvant therapy of docetaxel/trastuzumab/pertuzumab (THP) with a median of 4 cycles in 30 patients (68.2%) or docetaxel/trastuzumab/pertuzumab/carboplatin (THPCarb) with a median of 6 cycles in 14 patients (31.8%). In total, 70.5% of patients experienced pCR; among hormone receptor-negative cases, 75.0% achieved pCR and in tumors expressing hormone receptors, the rate of pCR was 66.7%. Of those patients subjected to neoadjuvant treatment with THP, 66.7% (20/30) achieved pCR, whereas 78.6% (11/14) of patients who received THPCarb had a pCR. The incidence of drug-related adverse events was 59.1% and in none of the patients, administration was discontinued due to toxicity. The present results of Peruvian patients with HER2 breast cancer treated according to clinical routine demonstrated that dual blockade of HER2 with trastuzumab and pertuzumab in the neoadjuvant setting achieved high rates of pCR even in hormone receptor-positive patients. These results are consistent with those of randomized controlled trials, with a good safety profile. en_US
dc.language.iso eng
dc.publisher Spandidos Publications
dc.relation.ispartofseries Molecular and Clinical Oncology
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Neoadjuvant pertuzumab en_US
dc.subject non‑metastatic en_US
dc.subject HER2‑positive en_US
dc.subject breast tumors en_US
dc.subject Peru en_US
dc.title Neoadjuvant pertuzumab in non-metastatic HER2-positive breast tumors: Multicentric study in Peru (NeoHer) en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.3892/mco.2022.2503
dc.relation.issn 2049-9469


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