Breast conservation therapy

🎗️ Core Concept - Saving the Breast

• Breast Conservation Therapy (BCT) combines lumpectomy (wide local excision) with adjuvant radiation therapy.
• Goal: Achieve oncologic outcomes equivalent to mastectomy while preserving the breast.
• Key Components:
  • Surgical Excision: Removal of the tumor with a rim of normal tissue to achieve negative margins ("no ink on tumor").
  • Radiation: Adjuvant whole-breast radiation therapy (WBRT) is standard to ↓ local recurrence.
  • Axillary Staging: Typically involves sentinel lymph node biopsy (SLNB).

⭐ For early-stage invasive breast cancer (Stage I & II), BCT offers equivalent long-term survival compared to mastectomy.

• Absolute Contraindications:
  • Multicentric disease (>1 quadrant)
  • Diffuse malignant microcalcifications
  • Inflammatory breast cancer
  • Prior radiation to the chest/breast
  • Inability to achieve negative margins

🎯 The Ideal Candidate

• Primary Goal: Achieve negative surgical margins with a good cosmetic result.
• Core Principle: Patient must be able to receive adjuvant radiation therapy (RT).

Inclusion Criteria:

• Single, unifocal tumor.
• Tumor size < 5 cm (relative to breast size).
• Patient preference for breast conservation.
• No contraindications to RT.

Contraindications to BCT:

• Absolute:
  • Multicentric disease (tumors in >1 quadrant).
  • Diffuse malignant microcalcifications.
  • Inflammatory breast cancer.
  • Pregnancy (RT is teratogenic).
  • History of prior radiation to the breast/chest.
• Relative:
  • Collagen vascular disease (e.g., scleroderma).
  • Large tumor in a small breast (poor cosmesis).

⭐ BCT (lumpectomy + radiation) offers equivalent long-term survival rates to mastectomy for most women with early-stage invasive breast cancer.

💃 Management - The Surgical Dance

BCT is a three-part procedure: lumpectomy, nodal evaluation, and radiation.

• Lumpectomy (Wide Local Excision):
  • Goal: Achieve negative surgical margins, defined as "no ink on tumor."
  • Resects the tumor with a surrounding rim of normal breast tissue.
• Axillary Staging:
  • Sentinel Lymph Node Biopsy (SLNB): Standard for clinically node-negative (cN0) patients.
  • If SLNB is positive, consider Axillary Lymph Node Dissection (ALND) or regional nodal radiation.
• Adjuvant Radiation Therapy (RT):
  • Mandatory component of BCT, typically whole-breast radiation.
  • Significantly ↓ risk of ipsilateral breast tumor recurrence.

⭐ For eligible patients with early-stage breast cancer, BCT (lumpectomy + radiation) provides equivalent overall survival rates compared to mastectomy.

⚠️ Complications - When Things Go South

• Surgical (Early):
  • Positive Margins: Most common reason for re-operation. Requires re-excision to achieve negative margins ("no ink on tumor").
  • Seroma: Most common complication. Fluid collection, usually self-resolves. Symptomatic cases may need aspiration.
  • Infection: Cellulitis or abscess.
• Post-Radiation (Late):
  • Lymphedema: Chronic arm swelling, risk ↑ with axillary lymph node dissection (ALND).
  • Fat Necrosis: Benign, can calcify and mimic recurrence on mammogram.
  • Poor Cosmesis: Fibrosis, breast asymmetry, skin retraction.

⭐ Positive margins after lumpectomy are the most common indication for re-operation to ensure local control before starting radiation therapy.

⚡ Biggest Takeaways

• Breast Conservation Therapy (BCT) combines lumpectomy with adjuvant radiation.
• Survival rates are equivalent to mastectomy for most early-stage (I/II) invasive cancers.
• Key indications: Unicentric tumor, size typically <5 cm, and ability to achieve negative margins.
• Absolute contraindications: Multicentric disease, diffuse malignant microcalcifications, prior chest radiation, and pregnancy.
• Persistent positive margins after re-excision are an absolute contraindication, requiring mastectomy.
• Sentinel lymph node biopsy (SLNB) is the standard for axillary staging.