Table 1

Clinical and pathological characteristics of the study population

CharacteristicNo. (%) of patients
Primary tumour stage
 Tis28 (9.3)
 T1mic2 (0.7)
 T1a19 (6.3)
 T1b31 (10.3)
 T1c139 (46.3)
 T278 (26.0)
 T32 (0.7)
 Not documented1 (0.3)*
Case laterality
 Unilateral279 (93.0)
 Bilateral21 (7.0)
Histologic subtype
 DCIS28 (9.3)
 DCIS + microinvasive2 (0.7)
 Invasive ductal carcinoma247 (82.3)
 Invasive lobular carcinoma2 (0.7)
 Invasive ductal carcinoma with lobular features20 (6.7)
 Not documented1 (0.3)
Distribution of the invasive carcinoma
 Unifocal219 (73.0)
 Multifocal51 (17.0)
 Not documented2 (0.7)
Type of surgery
 Lumpectomy230 (76.7)
 Mastectomy70 (23.3)

  • DCIS = ductal carcinoma in situ.

  • ↵* Patient with a core biopsy with invasive ductal carcinoma; final pathology did not report additional invasive tumour.