What is the primary surgical treatment for early-stage breast cancer
What is the primary surgical treatment for early-stage breast cancer (stage I-II)?
A. Mastectomy
B. Lumpectomy with sentinel lymph node biopsy
C. Radical mastectomy
D. Breast-conserving surgery without lymph node evaluation
Answer: B
Explanation: Lumpectomy plus sentinel lymph node biopsy is the standard breast-conserving surgery for early-stage breast cancer.

