Could targeted drugs replace chemo for certain breast cancers?

NCT ID NCT06068985

First seen Feb 14, 2026 · Last updated May 14, 2026 · Updated 12 times

Summary

This study looks at whether some women with HER2-positive early breast cancer can be treated with just the targeted drugs pertuzumab and trastuzumab (PHESGO™) without chemotherapy. Researchers use specific markers to pick patients whose tumors depend heavily on HER2. The goal is to see if this approach can still clear the cancer while avoiding chemo side effects.

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Contacts and locations

Locations

  • A.C. Camargo Cancer Center

    São Paulo, São Paulo, 01.509-001, Brazil

  • Centro Paulista de Oncologia (Oncoclínicas)

    São Paulo, São Paulo, 04.538-135, Brazil

  • Centro de Câncer de Brasília - CETTRO (Oncoclínicas)

    Brasília, Federal District, 70.710-904, Brazil

  • Centro de Pesquisa Vencer & Oncoclínica

    Teresina, Piauí, 60.449-200, Brazil

  • Centro de Pesquisa do Hospital Pérola Byington

    São Paulo, São Paulo, 01.317-000, Brazil

  • Centro de Pesquisa em Oncologia do Hospital São Lucas da PUCRS - CPO

    Porto Alegre, Rio Grande do Sul, 90.610-000, Brazil

  • Hospital da Fundação Oswaldo Aranha - HFOA

    Volta Redonda, Rio de Janeiro, 27.251-260, Brazil

  • Hospital de Amor de Barretos

    São Paulo, São Paulo, 14.784-400, Brazil

  • Instituto Nacional de Câncer - INCA

    Rio de Janeiro, Rio de Janeiro, 20.230-130, Brazil

  • Instituto do Câncer do Estado de São Paulo - ICESP

    São Paulo, São Paulo, 01.246-000, Brazil

  • Núcleo de Oncologia da Bahia - NOB (Oncoclínicas)

    Salvador, Estado de Bahia, 40.170-110, Brazil

  • Oncocentro Belo Horizonte (Oncoclínicas)

    Belo Horizonte, Minas Gerais, 30.360-680, Brazil

  • Santa Casa de Porto Alegre

    Porto Alegre, Rio Grande do Sul, 90.050-170, Brazil

  • Universidade Estadual de Campinas - UNICAMP

    Campinas, São Paulo, 13.083-881, Brazil

Conditions

Explore the condition pages connected to this study.