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Table 3 Locations of epicentres that were marginal or outside of RTOG and ESTRO Nodal CTVs

From: PET/CT of breast cancer regional nodal recurrences: an evaluation of contouring atlases

RTOG CTVs

 

Classification of RNRs

(Percentage for RTOG CTV)

Direction of Marginal or Outside RNR compared to RTOG CTVs

Number (Percentage of all 68 Marginal and Outside RNRs)

RNR

n = 226

Outside

n = 60

Marginal

n = 8

Inside

n = 158

Cranial

Caudal

Anterior

Posterior

Lateral

Medial

SCF

56

28 (50%)

1 (2%)

27 (48%)

5 (7%)

  

21 (31%)*

3 (4%)

 

Axilla level I

64

6 (9%)

0

58 (91%)

1 (1%)

1 (1%)

1 (1%)

1 (1%)

2 (3%)

 

Axilla level II

37

11 (30%)

1 (3%)

25 (68%)

3 (4%)

12 (18%)†

2 (3%)

   

Axilla level III

35

9 (17%)

1 (3%)

25 (80%)

3 (4%)

3 (4%)

 

1(1%)

1 (1%)

2 (3%)

IMC

34

6 (18%)

5 (15%)

23 (68%)

 

2 (3%)

  

2 (3%)

7 (10%)

* RADCOMP Posterior Neck

21

3 (14%)°

0

18 (86%)

3 (100%)

     

ESTRO-CTVs

 

Classification of RNRs

(Percentage for ESTRO-CTV)

Direction of Marginal or Outside RNR compared to ESTRO-CTVs

Number (Percentage of all 61 Marginal and Outside RNRs)

 

RNR

n = 226

Outside

n = 57

Marginal

n = 4

Inside

n = 165

Cranial

Caudal

Anterior

Posterior

Lateral

Medial

SCF

56

33 (59%)

1 (2%)

22 (39%)

9 (15%)

  

21 (34%)*

3 (5%)

1 (2%)

Axilla Level I

64

8 (13%)

0

56 (87%)

1 (1%)

1 (1%)

1 (1%)

4 (7%)

1 (1%)

 

Axilla Level II

27

6 (22%)

0

21 (78%)

3 (5%)

1 (1%)

 

2 (3%)

  

Interpectoral

11

0

0

11 (100%)

      

Axilla Level III

34

7 (12%)

1 (3%)

26 (85%)

3 (5%)

3 (5%)

   

2 (3%)

IMC

34

3 (9%)

2 (6%)

29 (85%)

 

2 (3%)

   

3 (3%)

* RADCOMP Posterior Neck

21

3 (14%)°

0

18 (86%)

3 (100%)

     
  1. Abbreviation: RNR Regional nodal recurrence