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Start free with EleplanPrimary cutaneous marginal zone B-cell lymphoma
ORPHA:178536Disease
Also called PCMZL
What it is
A rare, indolent primary cutaneous B-cell lymphoma characterized by multifocal, red to violaceous papules, plaques or nodules localized predominantly on the trunk and extremities. Histologically, these are dermis infiltrates consisting of small, marginal zone B cells, lymphoplasmacytic cells, and plasma cells. Marginal zone B cells express CD20, CD79a and Bcl-2, and are negative for CD5, CD10 and Bcl-6. Plasma cells are typically located at the periphery, and express CD138, CD79a, and monotypic light chains.
Key facts
- Classified as
- Disease
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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