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Table 4 Comparison between benign and malignant causes as regards post-contrast enhancement in MDCT cholangiography

From: Validity of MDCT cholangiography in differentiating benign and malignant biliary obstruction

Enhancement in MDCT cholangiography

Malignant causes

Benign causes

Test±

p value (Sig.)

(N=41)

(N=28)

No.

%

No.

%

Arterial phase

 Absent

18

43.9%

23

82.1%

13.956

<0.001 (HS)

 Present

23

56.1%

5

17.9%

  Rim

10

24.4%

3

10.7%

15.840

0.001 (S)

  Homogenous

4

9.8%

2

7.1%

  Heterogeneous

9

21.9%

0

0%

Porto-venous phase

 Absent

30

73.2%

25

89.3%

3.920

0.048 (S)

 Present

11

26.8%

3

10.7%

  Rim

0

0%

2

7.1%

9.910

0.019 (S)

  Homogenous

7

17.1%

1

3.6%

  Heterogeneous

4

9.7%

0

0%

Delayed phase

 Absent

40

97.6%

27

96.4%

0.021

1.000 (NS)

 Present

1

2.4%

1

3.6%

  Rim

0

0%

1

3.6%

2.042

0.360 (NS)

  Homogenous

1

2.4%

0

0%

  Heterogeneous

0

0%

0

0%