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Table 1 MR imaging features compared with histopathologic findings

From: High Resolution MR Imaging guidelines in retinoblastoma: prospective study correlated with histopathological results

Histopathologic Finding

N

TP

FP

TN

FN

Sensitivity (%)

Specificity (%)

Accuracy (%)

NPV

PPV

k

Postlaminar ON invasion

58

23

4

27

4

85.2

87

86.2

87.1

85.2

0.723

Prelaminar ON invasion

58

10

7

34

7

58.8

82.9

75.8

82.9

58.8

0.418

Choroid invasion

58

41

6

9

2

95.3

60

86.2

81.8

87.2

0.606

Scleral invasion

58

5

0

49

4

55.6

100

93

92.5

100

0.679

Extrascleral invasion

58

4

1

53

0

100

98

98.3

100

80

0.88

Ciliary body invasion

58

0

13

44

1

0

77.2

77.2

  1. ON optic nerve, N number, TP true positive, FP false positive, TN true negative, FN false negative, NPV negative predictive value, PPV positive predictive value, k kappa value