Table 2 Tumor characteristics of all 204 BCS cases
Tumor characteristics | Number (percentage or range) |
|---|---|
Originally palpable mass | Â |
   Yes | 79 (39%) |
   No | 112 (55%) |
   Indeterminate | 13 (6%) |
Tumor (pT) size (centimeters) | 1.6 (0.08 – 6.0) |
Tumor location | Â |
   Upper outer quadrant | 105 (52%) |
   Upper inner quadrant | 40 (20%) |
   Lower outer quadrant | 29 (14%) |
   Lower inner quadrant | 22 (11%) |
   Subareolar | 8 (4%) |
Tumor histopathology | Â |
   Invasive ductal carcinoma | 165 (81%) |
   Invasive lobular carcinoma | 12 (6%) |
   Mixed invasive ductal and lobular carcinoma | 8 (4%) |
   Invasive carcinoma not otherwise specified | 7 (3%) |
   Mucinous (colloid) carcinoma | 7 (3%) |
   Papillary carcinoma | 3 (2%) |
   Adenoid cystic carcinoma | 2 (1%) |
Histologic grade | Â |
   Well-differentiated | 52 (25%) |
   Moderately-differentiated | 71 (35%) |
   Poorly-differentiated | 81 (40%) |
Estrogen receptor positive | 155 (76%) |
Progesterone receptor positive | 135 (66%) |
Her 2 Neu positive | 26 (12.7%) |
Lymphovascular invasion | 36 (18%) |
Associated ductal carcinoma in situ (DCIS) | 131 (64%) |
Associated axillary lymph node involvement | Â |
   Yes | 37 (18%) |
   No | 158 (78%) |
   Not assessed | 9 (4%) |
Type of original diagnostic breast biopsy | Â |
   14-gauge core biopsy | 74 (36%) |
   8- or 11-gauge ultrasound mammotome biopsy | 52 (25%) |
   8- or 11-gauge stereotactic mammotome biopsy | 38 (19%) |
   Surgical (excisional) biopsy | 40 (20%) |