Axillary dissection has been a routine part of breast cancer and dissection for lesions more advanced than duct carcinoma in situ (DCIS). But the axillary node dissection should be performed routinely for T1a-because of the low yield of positive nodes during axillary node dissection. However, this lymph node analysis is often unnecessarily performed in DCIS patients.

What are the guidelines? Any evidence-based recommendations on this issue?