Breast specimen (primary tumor) Axillary lymph nodes
Organ site Total number of lymph nodes identified
Procedure Total number of positive lymph nodes
Histologic type Largest dimension of the largest tumor deposit
Histologic grade Presence of extranodal extension
Number of foci of invasive carcinoma  
Size of invasive carcinoma  
Lymphovascular invasion  
Margin status  
Presence and extent of ductal carcinoma in situ  
Skin, nipple, or skeletal muscle involvement, if available for assessment  
Total number of lymphnodes identified  
Total number of positive lymph nodes  
Largest dimension of the largest tumor deposit  
Presence of extranodal extension  
Table 1: Scientifically validated data elements for invasive breast cancer pathology report.