Table 2 Patient and tumour characteristics^a

Median age at diagnosis, years [range]

Tumour classification

   T1

   T2

   T3

   T4

   TX

Node classification

   N0

   N1

   N2

   N3

   NX

Metastasis classification

   M0

   M1

   MX

Histology

   Ductal

   Lobular

   Other^b

SBR grade

   I

   II

   III

   NE

Tubule formation

   1

   2

   3

   NE

Nuclear pleomorphism

   1

   2

   3

   NE

Mitotic count

   1

   2

   3

   NE

Peritumoural vascular invasion

   Yes

   No

   NE