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Table 3 Summary of discordance for each lymphoma subtype made by all hematopathologists

From: Interobserver variation in classifying lymphomas among hematopathologists

Consensus diagnosis

Overall frequency (%)

Category of diagnosesa(%)

Concordance

Minor discordance

Major discordance

Serious discordance

Diffuse large B-cell lymphoma

68 (58)

93

4

3

0

Follicular lymphoma

7 (6)

77

20

3

0

MALT lymphoma

6 (5)

79

12

9

0

Nodular sclerosis classical HL

6 (5)

81

19

0

0

Extranodal NK/T-cell lymphoma

5 (4)

65

23

12

0

Nodal marginal zone lymphoma

3 (3)

72

16

6

6

Mixed cellularity classical HL

3 (3)

59

41

0

0

Mantle cell lymphoma

3 (3)

100

0

0

0

Peripheral T-cell lymphoma, NOS

3 (3)

75

13

6

6

Angioimmunoblastic T-cell lymphoma

2 (2)

90

10

0

0

Anaplastic large cell lymphoma

2 (2)

91

0

9

0

T lymphoblastic lymphoma

2 (2)

78

22

0

0

Lymphoplasmacytic lymphoma

2 (2)

18

55

27

0

Classical HL

1 (1)

100

0

0

0

Lymphocyte-rich classical HL

1 (1)

33

67

0

0

Marginal zone/lymphoplasmacytic lymphomab

1 (1)

100

0

0

0

Subcutaneous panniculitis-like T-cell lymphoma

1 (1)

100

0

0

0

Cutaneous T-cell lymphoma, unclassified

1 (1)

75

25

0

0

Average

 

86

10

3.5

0.3

  1. aPlease see the description of each diagnostic category in Table 1.
  2. bA CD5-/CD10-/cyclin D1- small B-cell neoplasm with plasmacytic differentiation in a bone marrow biopsy which definite subtype could not be classified.