2A80 Follicular lymphoma

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Follicular lymphoma (FL) is a neoplasm composed of follicle centre (germinal centre) B-cells (typically both centrocytes and centroblasts/large transformed cells), which usually has at least a partially follicular pattern. t(14;18) with BCL2 rearrangement is frequently observed. If diffuse areas of any size comprised predominantly or entirely of blastic cells are present in any case of follicular lymphoma, a diagnosis of diffuse large B-cell lymphoma is also made. Lymphomas composed of centro cytes and centroblasts with an entirely diffuse pattern in the sampled tissue may be included in this category.

inclusions

• follicular lymphoma with or without diffuse areas

exclusions

• Mature T-cell or NK-cell neoplasms  (2A90-2B2Z)

sections/codes in this section (2A80-2A80)

• Follicular lymphoma grade 1  (2A80.0)
• Follicular lymphoma grade 2  (2A80.1)
• Follicular lymphoma grade 3  (2A80.2)
• Primary cutaneous follicle centre lymphoma  (2A80.3)
• Paediatric type follicular lymphoma  (2A80.4)
• Follicular lymphoma in situ  (2A80.5)
• Follicular lymphoma of small intestine  (2A80.6)
• Other specified follicular lymphoma  (2A80.Y)
• Follicular lymphoma, unspecified  (2A80.Z)

postcoordination

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