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Table 2 TNM staging of 18F-fluorodeoxyglucose and 18F-fluoroestradiol PET/CT

From: Head-to-head comparison of 18F-FDG and 18F-FES PET/CT for initial staging of ER-positive breast cancer patients

Cases

18F-flurodeoxyglucose PET/CT

18F-fluoroestradiol PET/CT

T

N

M

Stage

T

N

M

Stage

1

1

0

0

1

1

0

0

1

2

1

1**

0

2a

1

0

0

1

3

2

1

0

2b

2

1

0

2b

4

4

0*

0*

3b

4

1

1

4

5

2

0

0

2a

2

0

0

2a

6

4

0

1**

4

4

0

0

3b

7

4

1

0

3b

4

1

0

3b

8

4

0

0

3b

4

0

0

3b

9

4

3

1

4

4

3

1

4

10

2

3

1

4

2

3

1

4

11

2

3

1

4

2

3

1

4

12

4

3

1**

4

4

3

0

3c

13

4

3

1

4

4

3

1

4

14

2

1

0*

2b

2

1

1

4

15

3

3

0

3c

3

3

0

3c

16

1

0*

0

1

1

1

0

2a

17

2

3

1**

4

0*

0*

0

0

18

3

2

1

4

3

2

1

4

19

0*

0*

0

0

1

1

0

2a

20

2

0

0

2a

2

0

0

2a

21

2

1

0

2b

2

1

0

2b

22

1

1

0

2a

1

1

0

2a

23

2

0

0

2a

2

0

0

2a

24

2

1

1

4

2

0*

0*

2a

25

2

0*

0

2a

2

1

0

2b

26

2

1

1

4

2

1

1

4

27

2

0

0

2a

2

0

0

2a

28

2

0

0

2a

2

0

0

2a

  1. *False negative lesion, resulting in down staging, ** False positive lesion, resulting in up staging
  2. PET/CT Positron emission tomography/computed tomography