Management of Locally Advanced Breast Cancer with Chest Wall Infiltration

Initial Assessment and Staging

Patients with large tumors (>4cm) infiltrating the chest wall are typically classified as locally advanced breast cancer and are not initially candidates for breast conservation surgery, according to the National Comprehensive Cancer Network and Annals of Oncology guidelines 1, 2
Chest wall infiltration indicates a T4 classification, which traditionally would require mastectomy, as stated by the National Comprehensive Cancer Network and Annals of Oncology 1, 3

Neoadjuvant therapy (chemotherapy and/or radiotherapy) can downstage large tumors, converting patients who would require mastectomy into candidates for breast conservation, as reported by Ca-A Cancer Journal for Clinicians 4
Preoperative chemotherapy has been shown to increase breast conservation rates from 59.8% to 67.8% in patients with large tumors, according to Ca-A Cancer Journal for Clinicians 4
For T4 tumors with chest wall involvement, neoadjuvant therapy is particularly important to achieve adequate tumor reduction before attempting conservative surgery, as recommended by the National Comprehensive Cancer Network 1

Adjuvant radiotherapy to the breast and regional nodes is mandatory after breast conservation surgery, as stated by Annals of Oncology and the National Comprehensive Cancer Network 2, 3
Completion of planned chemotherapy regimen if not completed preoperatively, as recommended by the National Comprehensive Cancer Network 1
Endocrine therapy should be added if the tumor is hormone receptor-positive, according to the National Comprehensive Cancer Network 1

Regular clinical examination every 4-6 months for 5 years, then annually, as recommended by the National Comprehensive Cancer Network 1
Annual mammography, as suggested by the National Comprehensive Cancer Network 1
Monitoring for local recurrence, particularly in the first two years after treatment, as reported by the British Journal of Cancer 5