Table 2. Radiological and pathological size measurements for each operation type and the influence of grade and specimen slice radiography.

			DCIS grade
			All		High		Intermediate		Low
Type of operation	Specimen slice X-ray	Type of size	No. of cases	Median size (mm)	No. of cases	Median size (mm)	No. of cases	Median size (mm)	No. of cases	Median size (mm)
Successful primary BCS	All cases	Pathological	1430	12	857	14	448	10	125	7
		Radiological	1430	14	857	15	448	12	125	9
		Difference		2		1		2		2
	No	Pathological	836	12	470	13	290	10	76	7
		Radiological	836	13	470	15	290	12	76	9
		Difference		1		2		2		2
	Yes	Pathological	455	14	305	16	108	10	42	7
		Radiological	455	15	305	18	108	13	42	9
		Difference		1		2		3		2
Primary mastectomy	All cases	Pathological	551	32	441	35	86	27	24	18
		Radiological	551	49	441	50	86	46	24	64
		Difference		17		15		19		46
	No	Pathological	168	31	127	35	34	27	7	16
		Radiological	168	48	127	50	34	46	7	48
		Difference		17		15		19		32
	Yes	Pathological	125	31	96	37	21	22	9	18
		Radiological	125	45	95	48	21	37	9	80
		Difference		14		11		15		62
Unsuccessful primary BCS	All cases	Pathological	583	22	411	24	147	19	25	27
		Radiological	583	16	411	18	147	14	25	15
		Difference		−6		−6		−5		−12
	No	Pathological	339	23	237	24	83	21	14	27
		Radiological	339	16	237	19	83	14	14	12
		Difference		−7		−5		−7		−15
	Yes	Pathological	177	20	123	24	41	17	8	22
		Radiological	177	16	123	20	41	12	8	18
		Difference		−4		−4		−5		−4

Abbreviations: BCS=breast-conserving surgery; DCIS=ductal carcinoma in situ.

Note that all differences in the unsuccessful BCS group are negative.