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Evaluating the Impact of Neoadjuvant Chemotherapy Combined with Trastuzumab ± Pertuzumab/Pyrrolopyrimidine on the Success Rate of Breast-Conserving Surgery in Breast Cancer Patients

Evaluating the Impact of Neoadjuvant Chemotherapy Combined with Trastuzumab ± Pertuzumab/Pyrrolopyrimidine on the Success Rate of Breast-Conserving Surgery in Breast Cancer Patients

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR2600126680
Enrollment
Unknown
Registered
2026-06-13
Start date
2026-06-30
Completion date
Unknown
Last updated
2026-06-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

breast cancer

Interventions

Dual-target group (exposure group): neoadjuvant therapy with chemotherapy plus Trastuzumab and Pertuzumab or Pyrotinib:None
Single target group (non exposure group): chemotherapy+Trastuzumab:None

Sponsors

Guangxi Medical University Cancer Hospital
Lead Sponsor

Eligibility

Sex/Gender
Female
Age
18 Years to 70 Years

Inclusion criteria

Inclusion criteria: 1.According to the ACJJ breast cancer stage, the TNM stage at the first diagnosis is IIA, IIB, IIIA, IIIB, IIIC, breast cancer patients who are to undergo surgery and new adjuvant treatment in accordance with NCCN guidelines can also be included in the study if the patient's axillary lymph nodes are negative and the tumor size >= 2cm; 2.The patient was pathologically diagnosed as invasive breast cancer, and HER-2 expression was positive in breast cancer. HER-2 expression was defined as an immunohistochemical score of 3+or HER2 amplification rate of FISH >= 2; 3.Female patients aged 18-70 years; 4.General situation: ECOG 0-2; 5.The patient underwent imaging examinations (including mammography, CT and/or PET/CT, breast ultrasound and/or breast MRI) before, during, and after neoadjuvant therapy, and was assessed as unsuitable for stage I breast conserving surgery before surgery; 6.The patient's neoadjuvant therapy regimen includes anti-HER-2 targeted drugs;

Exclusion criteria

Exclusion criteria: 1.Inflammatory breast cancer; 2.Metastatic breast cancer; 3.Previous ipsilateral breast cancer history; 4.Previous breast radiotherapy or systemic treatment for breast cancer; 5.Pregnant or lactating women; 6.Patient experiences disease progression during neoadjuvant therapy; 7.The patient has other malignant tumors besides breast cancer.

Design outcomes

Primary

MeasureTime frame
Breast conserving surgery rate;

Secondary

MeasureTime frame
Pathological complete remission rate;Incidence of drug-related adverse reactions;Overall survival rate;Disease-Free Survival;Local recurrence rate;

Countries

China

Contacts

Public ContactYang Huawei

Guangxi Medical University Cancer Hospital

Lordyhw@163.com+86 771 5308635

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Jun 21, 2026