Table 3 Characteristics of patients with early-stage (I and II) pure mucinous carcinoma of the breast

Age, years,

<0.0001

mean (SD)

43.85 (7.53)

58.15 (15.62)

median

44.54

59.54

range

28, 68

28, 85

Tumor size, cm,

0.059

mean (SD)

3.42 (2.62)

2.39 (1.93)

median

3.0

2.0

range

0.20, 17.0

0.20, 12.0

Tumor stage, n, (%),

<0.0001

T1

5 (13.51)

19 (52.78)

T2

28 (75.68)

15 (41.67)

Unknown or other

8

3

grade, n (%),

1.000

I

11 (73.33)

8 (66.67)

II

4 (26.67)

4 (33.33)

Unknown or other

26

25

Stage, n (%)

<0.0001

I

4 (11.76)

19 (55.88)

II

30 (88.24)

15 (44.12)

Lymphovascular invasion, n (%),

0.018

present

7 (28)

1 (3.33)

absent

18 (72)

29 (96.67)

unknown or other

16

7

ER status, n (%),

0.112

positive

35 (85.37)

36 (97.30)

negative

6 (14.63)

1 (2.70)

PR status, n (%),

0.233

positive

32 (78.05)

33 (89.19)

negative

9 (21.95)

4 (10.81)

HER2 status, n (%),

0.199

positive

5 (14.29)

1 (3.03)

negative

30 (85.71)

32 (96.97)

unknown or other

6

4

Lymph node status, n (%),

0.013

positive

11 (28.21)

2 (5.56)

negative

28 (71.79)

34 (94.44)

not evaluated

2

1

Primary treatment, n (%),

0.056

mastectomy

31 (77.50)

20 (54.05)

lumpectomy with RT

8 (20)

16 (43.24)

lumpectomy without RT

1 (2.50)

1 (2.70)

no surgery

1

0

Follow up time, months

median

63

46

range

3, 139

9, 142

10-year disease-free survival

87.90%

92.86%

0.529

10-year overall survival rate

88.82%

100%

0.156