Table 3: Open in new tab Incidence of...

	Equality	S¹ pred.	S² pred.	S³ pred.	Others
Bronchial branching pattern
Typical trifurcated
B¹/B²/B³	12 (80%)	20 (57%)	11 (50%)	96 (61%)	56 (77%)
Bifurcated non-defective
B¹+B²/B³	1 (7%)	0	0	39 (25%)	9 (12%)
B¹+B³/B²	2 (13%)	1 (3%)	5 (23%)	1 (0.6%)	1 (1%)
B²+B³/B¹	0	4 (11%)	0	4 (3%)	0
Bifurcated defective
BX¹a + B²/BX¹b+B³	0	2 (6%)	1 (5%)	11 (7%)	5 (7%)
B¹ + BX²a/B³ + BX²b	0	2 (6%)	2 (9%)	1 (0.6%)	0
B¹ + BX³b / B² + BX³a	0	1 (3%)	0	0	1 (0%)
Atypical trifurcated
B¹a/B²/BX¹b + B³	0	2 (6%)	0	3 (2%)	1 (1%)
BX¹a + B²/BX¹b/B³		1 (3%)	0	0	0
B¹ + BX²a/BX²b/B³	0	1 (3%)	2 (9%)	0	0
B¹/BX²a/BX²b + B³	0	0	1 (5%)	1 (0.6%)	0
Displaced
B¹ displaced	0	0	0	1 (0.6%)	0
B² displaced	0	0	0	0	0
B³ displaced	0	1 (3%)	0	1 (0.6%)	0
Segmentectomy-specific bronchial branching complexity^a
B³ complexity during S³ segmentectomy		Non-pred.	Non-pred.	Pred.
Complex^a	NA	12 (34%)	9 (41%)	22 (14%)	NA
Simple^a	NA	23 (66%)	13 (59%)	136 (86%)	NA
B¹ complexity during S¹ segmentectomy		Pred.	Non-pred.	Non-pred.
Complex^a	NA	10 (29%)	10 (45%)	56 (35%)	NA
Simple^a	NA	25 (71%)	12 (55%)	102 (65%)	NA
B² complexity during S² segmentectomy		Non-pred.	Pred.	Non-pred.
Complex^a	NA	8 (23%)	6 (27%)	56 (35%)	NA
Simple^a	NA	27 (77%)	16 (73%)	102 (65%)	NA

Equality

S¹ pred.

S² pred.

S³ pred.

Others

N = 15

N = 35

N = 22

N = 158

N = 73

Bronchial branching pattern

Typical trifurcated

B¹/B²/B³

12 (80%)

20 (57%)

11 (50%)

96 (61%)

56 (77%)

Bifurcated non-defective

B¹+B²/B³

1 (7%)

39 (25%)

9 (12%)

B¹+B³/B²

2 (13%)

1 (3%)

5 (23%)

1 (0.6%)

1 (1%)

B²+B³/B¹

4 (11%)

4 (3%)

Bifurcated defective

BX¹a + B²/BX¹b+B³

2 (6%)

1 (5%)

11 (7%)

5 (7%)

B¹ + BX²a/B³ + BX²b

2 (6%)

2 (9%)

1 (0.6%)

B¹ + BX³b / B² + BX³a

1 (3%)

1 (0%)

Atypical trifurcated

B¹a/B²/BX¹b + B³

2 (6%)

3 (2%)

1 (1%)

BX¹a + B²/BX¹b/B³

1 (3%)

B¹ + BX²a/BX²b/B³

1 (3%)

2 (9%)

B¹/BX²a/BX²b + B³

1 (5%)

1 (0.6%)

Displaced

B¹ displaced

1 (0.6%)

B² displaced

B³ displaced

1 (3%)

1 (0.6%)

Segmentectomy-specific bronchial branching complexity^a

B³ complexity during S³ segmentectomy

Non-pred.

Pred.

Complex^a

12 (34%)

9 (41%)

22 (14%)

Simple^a

23 (66%)

13 (59%)

136 (86%)

B¹ complexity during S¹ segmentectomy

Pred.

Non-pred.

Complex^a

10 (29%)

10 (45%)

56 (35%)

Simple^a

25 (71%)

12 (55%)

102 (65%)

B² complexity during S² segmentectomy

Non-pred.

Pred.

Non-pred.

Complex^a

8 (23%)

6 (27%)

56 (35%)

Simple^a

27 (77%)

16 (73%)

102 (65%)

	Equality	S¹ pred.	S² pred.	S³ pred.	Others
Bronchial branching pattern
Typical trifurcated
B¹/B²/B³	12 (80%)	20 (57%)	11 (50%)	96 (61%)	56 (77%)
Bifurcated non-defective
B¹+B²/B³	1 (7%)	0	0	39 (25%)	9 (12%)
B¹+B³/B²	2 (13%)	1 (3%)	5 (23%)	1 (0.6%)	1 (1%)
B²+B³/B¹	0	4 (11%)	0	4 (3%)	0
Bifurcated defective
BX¹a + B²/BX¹b+B³	0	2 (6%)	1 (5%)	11 (7%)	5 (7%)
B¹ + BX²a/B³ + BX²b	0	2 (6%)	2 (9%)	1 (0.6%)	0
B¹ + BX³b / B² + BX³a	0	1 (3%)	0	0	1 (0%)
Atypical trifurcated
B¹a/B²/BX¹b + B³	0	2 (6%)	0	3 (2%)	1 (1%)
BX¹a + B²/BX¹b/B³		1 (3%)	0	0	0
B¹ + BX²a/BX²b/B³	0	1 (3%)	2 (9%)	0	0
B¹/BX²a/BX²b + B³	0	0	1 (5%)	1 (0.6%)	0
Displaced
B¹ displaced	0	0	0	1 (0.6%)	0
B² displaced	0	0	0	0	0
B³ displaced	0	1 (3%)	0	1 (0.6%)	0
Segmentectomy-specific bronchial branching complexity^a
B³ complexity during S³ segmentectomy		Non-pred.	Non-pred.	Pred.
Complex^a	NA	12 (34%)	9 (41%)	22 (14%)	NA
Simple^a	NA	23 (66%)	13 (59%)	136 (86%)	NA
B¹ complexity during S¹ segmentectomy		Pred.	Non-pred.	Non-pred.
Complex^a	NA	10 (29%)	10 (45%)	56 (35%)	NA
Simple^a	NA	25 (71%)	12 (55%)	102 (65%)	NA
B² complexity during S² segmentectomy		Non-pred.	Pred.	Non-pred.
Complex^a	NA	8 (23%)	6 (27%)	56 (35%)	NA
Simple^a	NA	27 (77%)	16 (73%)	102 (65%)	NA

Table 3:

Open in new tab

Incidence of bronchial branching patterns based on volumetry-predominant segmental patterns

	Equality	S¹ pred.	S² pred.	S³ pred.	Others
	N = 15	N = 35	N = 22	N = 158	N = 73
Bronchial branching pattern
Typical trifurcated
B¹/B²/B³	12 (80%)	20 (57%)	11 (50%)	96 (61%)	56 (77%)
Bifurcated non-defective
B¹+B²/B³	1 (7%)	0	0	39 (25%)	9 (12%)
B¹+B³/B²	2 (13%)	1 (3%)	5 (23%)	1 (0.6%)	1 (1%)
B²+B³/B¹	0	4 (11%)	0	4 (3%)	0
Bifurcated defective
BX¹a + B²/BX¹b+B³	0	2 (6%)	1 (5%)	11 (7%)	5 (7%)
B¹ + BX²a/B³ + BX²b	0	2 (6%)	2 (9%)	1 (0.6%)	0
B¹ + BX³b / B² + BX³a	0	1 (3%)	0	0	1 (0%)
Atypical trifurcated
B¹a/B²/BX¹b + B³	0	2 (6%)	0	3 (2%)	1 (1%)
BX¹a + B²/BX¹b/B³		1 (3%)	0	0	0
B¹ + BX²a/BX²b/B³	0	1 (3%)	2 (9%)	0	0
B¹/BX²a/BX²b + B³	0	0	1 (5%)	1 (0.6%)	0
Displaced
B¹ displaced	0	0	0	1 (0.6%)	0
B² displaced	0	0	0	0	0
B³ displaced	0	1 (3%)	0	1 (0.6%)	0
Segmentectomy-specific bronchial branching complexity^a
B³ complexity during S³ segmentectomy		Non-pred.	Non-pred.	Pred.
Complex^a	NA	12 (34%)	9 (41%)	22 (14%)	NA
Simple^a	NA	23 (66%)	13 (59%)	136 (86%)	NA
B¹ complexity during S¹ segmentectomy		Pred.	Non-pred.	Non-pred.
Complex^a	NA	10 (29%)	10 (45%)	56 (35%)	NA
Simple^a	NA	25 (71%)	12 (55%)	102 (65%)	NA
B² complexity during S² segmentectomy		Non-pred.	Pred.	Non-pred.
Complex^a	NA	8 (23%)	6 (27%)	56 (35%)	NA
Simple^a	NA	27 (77%)	16 (73%)	102 (65%)	NA

	Equality	S¹ pred.	S² pred.	S³ pred.	Others
	N = 15	N = 35	N = 22	N = 158	N = 73
Bronchial branching pattern
Typical trifurcated
B¹/B²/B³	12 (80%)	20 (57%)	11 (50%)	96 (61%)	56 (77%)
Bifurcated non-defective
B¹+B²/B³	1 (7%)	0	0	39 (25%)	9 (12%)
B¹+B³/B²	2 (13%)	1 (3%)	5 (23%)	1 (0.6%)	1 (1%)
B²+B³/B¹	0	4 (11%)	0	4 (3%)	0
Bifurcated defective
BX¹a + B²/BX¹b+B³	0	2 (6%)	1 (5%)	11 (7%)	5 (7%)
B¹ + BX²a/B³ + BX²b	0	2 (6%)	2 (9%)	1 (0.6%)	0
B¹ + BX³b / B² + BX³a	0	1 (3%)	0	0	1 (0%)
Atypical trifurcated
B¹a/B²/BX¹b + B³	0	2 (6%)	0	3 (2%)	1 (1%)
BX¹a + B²/BX¹b/B³		1 (3%)	0	0	0
B¹ + BX²a/BX²b/B³	0	1 (3%)	2 (9%)	0	0
B¹/BX²a/BX²b + B³	0	0	1 (5%)	1 (0.6%)	0
Displaced
B¹ displaced	0	0	0	1 (0.6%)	0
B² displaced	0	0	0	0	0
B³ displaced	0	1 (3%)	0	1 (0.6%)	0
Segmentectomy-specific bronchial branching complexity^a
B³ complexity during S³ segmentectomy		Non-pred.	Non-pred.	Pred.
Complex^a	NA	12 (34%)	9 (41%)	22 (14%)	NA
Simple^a	NA	23 (66%)	13 (59%)	136 (86%)	NA
B¹ complexity during S¹ segmentectomy		Pred.	Non-pred.	Non-pred.
Complex^a	NA	10 (29%)	10 (45%)	56 (35%)	NA
Simple^a	NA	25 (71%)	12 (55%)	102 (65%)	NA
B² complexity during S² segmentectomy		Non-pred.	Pred.	Non-pred.
Complex^a	NA	8 (23%)	6 (27%)	56 (35%)	NA
Simple^a	NA	27 (77%)	16 (73%)	102 (65%)	NA

Data are presented as number (%).

Bronchial branching patterns in the predominant segment are defined as follows: complex, any bronchial branching pattern that requires surgical division of >1 bronchial branch or only 1 branch but requires preservation of the proximal branch(es) after the first segmental branch that belongs to another segment during segmentectomy of the index segment; simple, any bronchial branching pattern that requires surgical division of only 1 index segmental bronchus without preservation of any branches after the first segmental branch. Underlines represent cases of complex bronchial patterns in the predominant segment.

B¹: apical branch; B²: posterior branch; B³: anterior branch; BX: defective bronchial branch; NA: not applicable; Pred.: predominant; S^X pred.: one-segment-predominant relationship (S¹ predominant, S² predominant, and S³ predominant).

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