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Table 2 Tumor characteristics

From: Role of patient and tumor characteristics in sentinel lymph node metastasis in patients with luminal early breast cancer: an observational study

Histology—N (%)  
 Ductal 199 (57.7)
 Lobular 56 (16.2)
 Mixed 56 (16.2)
 Othera 34 (9.9)
Average tumor size (mm)  
 Mean (SD) 15.66 (7.90)
 Min–max 1.00–50.00
Tumor size, distribution—N (%)  
 T < 20 mm 261 (75.7)
 20 mm < T ≤ 50 mm 84 (24.3)
Site of tumor—N (%)  
 QII 21 (6.1)
 QSI 46 (13.3)
 QSE 225 (65.2)
 QIE 45 (13.0)
 CENTRAL 8 (2.3)
Ki-67—(% expression)  
 Mean (SD) 15.02 (10.18)
 Min–max 5.00–80.00
Distribution of Ki-67 expression levels—N (%)  
 Low (0–13 % of cells) 198 (57.4)
 Intermediate (14–9 % of cells) 60 (17.4)
 High (≥20 % of cells) 87 (25.2)
Patients with ER positivity—N (%) 297 (86.1)
 ER positivity per patient—(% expression)  
 Mean (DS) 65.23 (33.35)
 Min–max 0.00–100.00
Patients with PGR positivity—N (%) 275 (79.7)
 PgR ≥20 % expression 238 (69.0)
 PgR positivity per patient—(% expression)  
  Mean (SD) 50.83 (36.59)
  Min–max 0.00–100.00
Patients with HER2 positivity—N (%) 45 (13.0)
 Distribution of histological grades—N (%)  
  Grade 1 69 (20.0)
  Grade 2 175 (50.7)
  Grade 3 101 (29.3)
Tumor subtypes—N (%)  
 Patients with luminal subtype 297 (86.1)
  luminal A 225 (75.8)
  luminal B 72 (24.2)
 Patients with HER 2 subtype 21 (6.1)
 Patients with triple negative subtype 27 (7.8)
Patients with LVI—N (%) 109 (31.6)
Patients with extensive DCIS/LCIS 98 (28.4)
  1. Min–max minimum and maximum values, LVI LymphoVascular Invasion, DCIS Ductal Carcinoma In Situ, LCIS Lobular Carcinoma In Situ
  2. aOther histological descriptions: mucinous; tubular; apocrine; medullary; papillary