Study on standardizing the omission of axillary dissection for breast cancer with disappeared lymph node metastases after preoperative chemotherapy

Study on standardizing the omission of axillary dissection for breast cancer with disappeared lymph node metastases after preoperative chemotherapy - Study on standardizing the omission of axillary dissection for breast cancer with disappeared lymph node metastases after preoperative chemotherapy

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000047801

Enrollment

100

Registered

2022-05-20

Start date

2020-06-01

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Breast cancer

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1.Histologically diagnosed breast cancer (regardless of histological type) 2.Diagnosed as positive for axillary lymph node metastasis 3.At the time of diagnosis, hormone receptor is negative 4.Clips can be inserted into lymph nodes that are positive for metastasis 5.Within 3 lymph nodes suspected of metastasis 6.Preoperative chemotherapy is planned 7.Patients who have given written consent to participate in this study

Exclusion criteria

Exclusion criteria: 1.Patients who cannot use the clips used in the research 2.Patients after breast implant insertion 3.Inflammatory breast cancer 4.Relapsed breast cancer 5.Pregnant patients 6.Patients who are infected or suspected of having an infectious disease 7.Patients who are judged to be ineligible at the discretion of the investigator 8.Sentinel lymph node cannot be identified 9.Clip lymph node cannot be identified 10.When the number of removed lymph nodes is less than the number determined to be metastatic lymph nodes before the start of treatment

Design outcomes

Primary

Measure	Time frame
Local recurrence rate	—

Countries

Japan

Contacts

Public ContactSayuka Nakayama

Showa University Hospital Department of Breast Surgical Oncology

osau0310@gmail.com03-3784-8000

Outcome results