Study of Correlation between MRI Morphology of Primary Tumor and Extramural Vascular Invasion in Rectal Cancer
Table 1
Characteristics of the primary tumor and pEMVI results.
Variables
N = 156
pEMVI
P value
Negative (n = 103) N (%)
Positive (n = 53) N (%)
Age (year)
63.69 ± 10.68
64.18 ± 10.99
62.76 ± 10.08
0.198
Gender
0.48
Male
103 (66)
70 (68)
33 (32)
Female
53 (34)
33 (62.3)
20 (37.7)
RRWI
0.139
≤1/3
11 (7.1)
9 (81.8)
2 (18.2)
1/3–2/3
55 (35.3)
38 (69.1)
17 (30.9)
≥2/3
90 (57.6)
56 (62.2)
34 (37.8)
NP
49 (31.4)
10 (20.4)
39 (79.6)
<0.001
CS
53 (34)
15 (28.3)
38 (71.7)
<0.001
IN
42 (26.9)
10 (23.8)
32 (76.2)
<0.001
Growth pattern
0.239
Limited mass
75 (48.1)
53 (70.7)
22 (29.3)
Circum wall
81 (51.9)
50 (61.7)
31 (38.3)
Relation with peritoneal reflex
Upper
53 (34)
36 (67.9)
17 (32.1)
0.491
Middle
73 (46.8)
45 (61.6)
28 (38.4)
Lower
30 (19.2)
22 (73.3)
8 (26.7)
Peritoneal reflex invasion
<0.001
Negative
145 (92.9)
101 (64.7)
44 (35.3)
Positive
11 (7.1)
9 (81.8)
2 (18.2)
Tumor length (cm)
5.26 ± 2.27
5.31 ± 2.51
5.16 ± 1.70
0.371
PLN
47 (30.1)
17 (36.2)
30 (63.8)
<0.001
Differentiation
0.033
Well
8
0
8
Moderately
131
44
87
Poorly
17
9
8
EMD (mm)
4.82 ± 5.00
2.78 ± 3.25
8.78 ± 5.44
<0.001
pEMVI: pathologic extramural vascular invasion; RRWI: range of rectal wall invaded by tumor; NP: nodular projection at the primary tumor’s edge; CS: cord sign at the primary tumor’s edge; IN: irregular nodules in the mesorectum; PLN: pathology-proven local node involvement; EMD: maximal extramural depth.
