Higher Volume at Time of Breast Conserving Surgery Reduces Re-Excision in DCIS

Table 1

(a) Comparison of patients who underwent BCS, BCS-AM, and TM procedures.

	BCS	BCS-AM	TM
No. of patients	201	151	53
Age (mean)	58	59	54
Age (median)	58	58	54
DCIS grade
Grade I	17	10	5
Grade II	88	53	15
Grade III	96	88	33
DCIS size
<1 cm	67	44	9
1-2 cm	37	22	6
2–5 cm	27	19	9
>5 cm	9	1	2
N/A	61	65	27
Necrosis
Yes	124	106	40
No	77	45	13
Calcifications
Yes	147	109	37
No	53	42	16
Multifocality
Yes	112	101	34
No	89	50	19
ER
71–100%	112	83	19
41–70%	8	10	3
11–40%	5	2	0
0–10%	29	26	23
N/A	47	30	8
PR
71–100%	22	15	8
41–70%	15	13	5
11–40%	24	16	4
0–10%	93	76	28
N/A	47	31	8
ER/PR
Both 71–100	29	19	8
Both <10	19	25	19
Margin**
Positive, <1 mm	117	61*	1
1-2 mm	23	9*	0
3–5 mm	17	17	0
6–9 mm	6	4	0
≥10 mm	37	60*	52
Re-excision	129	61***	2
Residual DCIS	65	33*	0

BCS: breast conserving surgery; BCS-AM: BCS plus additional margin; TM: total mastectomy. ^∗𝑃<.05, ^∗∗𝑃 total <.0001, ^∗∗∗𝑃<.0001.

(b) Indications for surgery and re-excision, categorized by surgeon.

	Surgeon A	Surgeon B	Surgeon C	Surgeon D	Total	%
Indication for surgery
Palpable mass	5	10	4	5	24	6.8
Nonpalpable mass	14	0	0	0	14	4.0
Calcifications	55	96	59	67	277	78.7
Mammographic lesion	53	15	59	70	197	56.0
Sonographic lesion	8	0	6	0	14	4.0
MRI lesion	6	11	7	1	25	7.1
Surgical procedure
Needle localization	60	85	40	67	252	71.6
Surgery bracket	10	2	4	0	16	4.5
Indication for re-excision
DCIS at margin	6	18	11	13	48	31.4
Clearance <1 mm	22	28	13	16	79	51.6
Clearance <2 mm	9	4	4	2	19	12.4
Clearance <3 mm	5	1	1	0	7	4.6