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Table 1 Patient and tumor demographics for invasive lobular carcinomas and invasive ductal carcinomas

From: Comparison of intraoperative frozen section analysis for sentinel lymph node biopsy during breast cancer surgery for invasive lobular carcinoma and invasive ductal carcinoma

 

ILC (n = 131)

IDC (n = 133)

Total cases (n = 264)

P-value

Age (years)

59 (35–87)

55 (24–82)

57 (24–87)

0.001

Tumor size (cm)

2.0 (0.2–9.0)

1.5 (0.1–6.5)

1.7 (0.1–9.0)

0.006

T-stage

    

   T1

75(58%)

88 (66%)

163 (62%)

0.298

   T2

49 (38%)

43 (32%)

92 (35%)

 

   T3

5 (4%)

2 (2%)

7 (3%)

 

   T4

1 (1%)

0 (0%)

1 (0.5%)

 

Tumor focality

    

   Unifocal

97 (75%)

123 (93%)

220 (84%)

<0.001

   Multifocal

19 (15%)

9 (7%)

28 (11%)

 

   Multicentric

14 (11%)

1 (1%)

15 (6%)

 

Histologic grade

    

   Grade 1

40 (31%)

32 (24%)

72 (27%)

<0.001

   Grade 2

57 (44%)

52 (39%)

109 (41%)

 

   Grade 3

17 (13%)

48 (36%)

65 (25%)

 

   Unknown

17 (13%)

1 (1%)

18 (7%)

 

ER status

    

   Positive

121 (93%)

96 (72%)

217 (82)

<0.001

   Negative

2 (2%)

29 (22%)

31 (12%)

 

   Unknown

8 (6%)

8 (6%)

16 (6%)

 

PR status

    

   Positive

108 (82%)

81 (61%)

189 (72%)

<0.001

   Negative

16 (12%)

44 (33%)

60 (23%)

 

   Unknown

7 (5%)

8 (6%)

15 (6%)

 

Her-2/neu

    

   Positive

13 (10%)

35 (26%)

48 (18%)

0.003

   Negative

106 (81%)

87 (65%)

193 (73%)

 

   Unknown

12 (9%)

11 (8%)

23 (9%)

 

LVI

    

   Positive

20 (15%)

41 (31%)

61 (23%)

0.005

   Negative

109 (83%)

92 (69%)

201 (76%)

 

   Unknown

2 (2%)

0 (0%)

2 (1%)

 
  1. ILC, invasive lobular carcinoma; IDC, invasive ductal carcinoma; ER, estrogen receptor; PR, progesterone receptor; LVI, lymphovascular invasion