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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.