Table 1.

Histopathological findings and grading in 484 cases of DCIS

	Grade	Number	%
Grading		494
		10 reservations were excluded
	G1	1	10
	G2	1	10
	G3	8	80
		484 cases remained for further assessments
	G1	44	9.0
	G2	18	4.0
	G3	422	87
Discrepancy cases; final grade (n = 41/484)		41	8.5
	G1	11	27
	G2	6	15
	G3	24	58
All cases with invasive components (n = 64/357)	G1 (n = 3)	n = 1 (pTmic), n = 2 (pT1a)	4.5
	G2 (n = 1)	n = 1 (pT1a)	1.5
G3 cases with invasive components (n = 60/64)	G3 (n = 60)	60	94
		20 (pTmic)	33
		24 (pT1a)	40
		16 (pT1b)	27
G3 cases with IHC (n = 51/357)		16 (pTmic)	31
		20 (pT1a)	39
		15 (pT1b)	30

Extent (mm)	Min	Max	Median	Mean
All cases (n = 484)	0.5	150	20	28.4
All cases with invasive component (n = 64)	4	120	30	37
G1/G2 (n = 4)	9	80	25	35