Based on the tumor characteristics described - a 3cm tumor that has infiltrated the pectoralis muscle with no lymph node involvement - this would be classified as Stage 3B breast cancer.
The key factor that makes this Stage 3B is the invasion into the chest wall (pectoralis muscle), regardless of the tumor size or lymph node Show Full Answer
Based on the tumor characteristics described - a 3cm tumor that has infiltrated the pectoralis muscle with no lymph node involvement - this would be classified as Stage 3B breast cancer.
The key factor that makes this Stage 3B is the invasion into the chest wall (pectoralis muscle), regardless of the tumor size or lymph node status. When breast cancer spreads to the chest wall, it is automatically categorized as at least Stage 3B. Treatment for Stage 3B breast cancer typically begins with chemotherapy (called neoadjuvant therapy) before surgery. This approach allows doctors to shrink the tumor first, which can make surgery more successful. Your oncology team will work with you to develop the most appropriate treatment plan based on your specific situation.
April 19, 2025
Join
Your Privacy Choices
