ICD-11 classes
03 Diseases of the blood or blood-forming organs
Neoplasms of haematopoietic or lymphoid tissues
Mature B-cell neoplasms
2A85 — Other specified mature B-cell neoplasms or lymphoma
2A85.1 — Extranodal marginal zone B-cell lymphoma of...
ICD-11 2A85.1 — Extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue of stomach
A low grade, indolent B-cell lymphoma, usually associated with Helicobacter pylori infection. Morphologically it is characterised by a dense mucosal atypical lymphocytic (centrocyte-like cell) infiltrate with often prominent lymphoepithelial lesions and plasmacytic differentiation. Some of gastric MALT lymphomas carry the t(11; 18)(q21; q21). Such cases are resistant to Helicobacter pylori therapy.
The diagnosis includes nothing.
The diagnosis excludes nothing.
It has no clarifying diagnoses.
The diagnosis is coded elsewhere: