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. 2013 Jan 10;2013:893104. doi: 10.1155/2013/893104

Table 4.

pathologic findings in undertreated and properly treated aged ≥71 years.

Pathologic finding Full treatment Undertreated P value
Histopathology
 Infiltrating ductal 149 (80%) 114 (60%) <0.001
 Infiltrating lobular 18 (10%) 25 (13%)
 Ductal carcinoma in situ 15 (8%) 51 (27%)
 Unknown 4 (2.2%) 0 (0%)
Tumor differentiation
 Well 26 (14%) 35 (18%) <0.001
 Moderately 91 (49%) 113 (59%)
 Poorly 57 (31%) 24 (13%)
 Unknown 12 (6.5%) 18 (9.5%)
Tumor size (cm)*
 Median 1.4 1.0 0.003
 0–2 128 (69%) 146 (77%) 0.169
 2.1–5 41 (22%) 32 (17%)
 >5.1 8 (4.3%) 4 (2.1%)
 Unknown 9 (4.8%) 8 (4.2%)
Involved nodes
 Mean 1.1 0.5 0.021
 0 119 (75%) 80 (81%) 0.103
 1–3 19 (12%) 14 (14%)
 4+ 21 (13%) 5 (5%)
Estrogen receptor positive 133/162 (82%) 140/155 (90%) 0.034
Final margin: close/involved 19/166 (11%) 23/175 (13%)
Examined nodes (mean) 8 3 <0.001
Axillary node dissections 153/167 (92%) 90/139 (65%) <0.001
Surgery
 Breast conservation 151 (81%) 167 (88%) 0.091
 Mastectomy 34 (18%) 23 (12%)
 Unknown 1 (0.5%) 0 (0%)
Postoperative chemotherapy 43/184 (23%) 5/190 (3%) <0.001
Tamoxifen 142/181 (78%) 98/183 (54%) <0.001
Radiation therapy 155/184 (84%) 29/89 (33%) <0.001

Data are presented as n or n (%).

*Size of invasive component.

Invasive tumors.