Internal Mammary Involvement

Remember following:

  • UIQ tumor have highest chance
  • Generally if axillary node negative —> chance of IM LN+ is ~5%
    • Except UIQ which would have 15%
  • If axillary node positive
    • Outer quadrant tumors —> ~20%
    • Inner Quadrant tumors:
      • Upper —> 70%
      • Lower and central —> 50%