ORPHA:178536
Primary cutaneous marginal zone B-cell lymphoma
Also known as: PCMZL
Publications
589
78.1th percentile
Trials
0
Interventional, condition-specific
Researchers
1,097
Distinct authors in sample
Gene link
—
Readiness
1/6
Stages with a signal
Clinical definition (Orphanet)
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.
Cross-references
Joined from Mondo / Orphanet. MeSH labels may enter searches; UMLS / OMIM / NCIT are stored for reference.
- MONDO:0015813
- UMLS:C1275321
- NCIT:C7230
Additional Mondo synonyms (9)
C-MALT · Primary cutaneous marginal zone B cell lymphoma of mucosa-associated lymphoid tissue · Primary cutaneous marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue · Primary cutaneous marginal zone lymphoma of mucosa-associated lymphoid tissue · cutaneous Immunocytoma · marginal zone B cell lymphoma of skin · marginal zone B cell lymphoma of the skin · salt lymphoma · skin-associated lymphoid tissue lymphoma
Research stages
Trial readiness signals
Where this condition sits on an open-data research pipeline — not how close a treatment is, and not medical advice. Empty stages often mean “not in these databases under this Mondo ID,” not “impossible.”
1/6 stages with a signal
Research-stage checklist from open sources (GenCC, literature, Monarch when enriched, ClinicalTrials.gov). Not a prognosis or care recommendation.
- Gene identifiedNot found
No GenCC disease–gene assertion in this build
- LiteraturePresent
589 matched papers (337 in last 10 years) Source
- Phenotype characterisedNot found
No HPO disease–phenotype associations via Monarch for these Mondo IDs
- Animal modelNot found
No Alliance genotype “model of” associations via Monarch for these Mondo IDs
- Orphan designationNot found
No FDA or EMA orphan-drug designation matched this disease via UMLS or preferred name Source
- Interventional trialNot found
No matched interventional trial under our ClinicalTrials.gov rules
Biology
Genes and phenotypes
Gene–disease validity from GenCC, plus phenotypes and animal models joined from Monarch Initiative via Mondo ID — not a clinical diagnosis aid.
Do we know what causes it?
Not yet — the cause hasn't been pinned down in GenCC.
No strong gene–disease assertion joined for this Orphanet entity.
Phenotypes (Monarch / HPO)
None returned for this Mondo ID. That often means “not linked under this ID,” not “no clinical features.”
Animal models (Monarch / Alliance)
None returned for this Mondo ID. Empty here is not proof that no model organism work exists under another name or gene.
Monarch fetch 2026-07-29
Therapies
Designations, candidates, and chemicals
FDA OOPD and EMA orphan designations, Open Targets clinical candidates, and CTD chemical associations via MyDisease.info. These never change the interventional-trial headline.
Orphan designation (FDA · EMA)
No designation matched this disease via UMLS or preferred name on the FDA OOPD mirror or EMA orphan register. Absence here is not proof that none exists under another wording.
Open Targets candidates
No drugs or clinical candidates returned for this Mondo ID on Open Targets.
CTD chemicals (MyDisease.info)
No CTD chemical associations returned for this Mondo ID.
Literature
Is anyone studying this?
589
589 papers have been published on this condition. That is a real research literature — still far smaller than common diseases (breast cancer: over 700,000 papers). Median papers in the last 10 years for a rare disease in this dataset (publications denominator n=3967) is 59.
589 papers since the earliest indexed year in this search — median last-10-year count for a rare disease in this dataset is 59 (publications denominator n=3967).
337 in the last 10 years · high confidence · 78.1th percentile (publications denominator)
Phrase hits: 589 · MeSH hits: 0
Who's working on it?
1,097
Distinct author names in 200 sampled papers — named people below.
Who's working on it?
No interventional trial matched this name; these authors publish on it in the sampled literature — a practical starting point for contact.
- 01Kempf W7 papers · 2025
Department of Dermatology, University Hospital Zurich, Zürich, Switzerland.
Papers in Europe PMC - 02
- 03Berti E5 papers · 2025
UOC Dermatologia, Dipartimento di Medicina Interna, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, University of Milan, Milan, Italy.
Papers in Europe PMC - 04Assaf C4 papers · 2026
Department of Dermatology and Venereology, Helios Hospital Krefeld, Germany.
Papers in Europe PMC - 05Bagot M4 papers · 2025
Department of Dermatology, APHP, Saint-Louis Hospital, F-75010 Paris, France.
Papers in Europe PMC - 06
- 07Battistella M4 papers · 2025
INSERM U976, Human Immunology, Pathophysiology and Immunotherapy, Institut de Recherche Saint-Louis, F-75010 Paris, France.
Papers in Europe PMC - 08Beylot-Barry M4 papers · 2025
Departments of Dermatology, Saint-André Hospital, CHU de Bordeaux, INSERM U1053, Université de Bordeaux, Bordeaux, France.
Papers in Europe PMC - 09Dalle S4 papers · 2025
Service de dermatologie, Université Claude Bernard Lyon I, Hospices Civils de Lyon, Lyon, France. stephane.dalle@chu-lyon.fr
Papers in Europe PMC - 10de Masson A4 papers · 2025
Department of Dermatology, APHP, Saint-Louis Hospital, F-75010 Paris, France.
Papers in Europe PMC
Clinical research
Is a treatment being tested?
0
interventional trials for this specific condition
No interventional trial testing a treatment matched this specific condition name on ClinicalTrials.gov (observational studies and pan-disease registries are listed separately when present).
Data as of 11 September 2026 · last trial check 11 September 2026
No matched interventional trials. This is true for 77.2% of diseases in the trials denominator (5501 of 7126). Here are the researchers publishing on it.
high confidence · 38.6th percentile (trials denominator)
Recruiting interventional trials
From the matched ClinicalTrials.gov set
No interventional trial testing a treatment was found for this specific condition name on ClinicalTrials.gov.
See who's working on it — people publishing on this disease are often the practical next contact when no trial is listed.
Other registries (secondary)
Broader net from EU CTIS, ISRCTN, and ICTRP when available — deduped against ClinicalTrials.gov IDs already counted above. Dual-model LLM relevance gates what we keep. These rows are not added to the interventional headline.
raw 1 · after dedupe 1 · already on CT.gov 0 · kept 0 · parent 0 · uncertain 1 · dropped 0 · fetched 2026-07-30
Source notes: ictrp: Error: ICTRP public search unavailable (WHO portal is SPA-only; SOAP needs partnership). Tried: https://apps.who.int/tri
No secondary-registry studies passed dual-model relevance for this condition name (after dedupe).
Uncertain / not reviewed (1)
Where to find support
Condition-specific patient organisations, when Orphanet lists them, are on the disease’s Orphanet page. We also link umbrella groups that support undiagnosed and ultra-rare families.
Orphanet entry for Primary cutaneous marginal zone B-cell lymphoma — check Associations / patient organisations on that page.
India — NPRD
Last verified 2026-07-26This ORPHAcode is not on our curated NPRD list (direct or Mondo-parent match). That does not decide clinical eligibility; families in India should ask a notified Centre of Excellence about current coverage.
Hand-curated for this project. ORPHAcode mappings are best-effort and may be incomplete or imprecise for umbrella categories. Parent (Mondo) matches mean the policy lists a broader category — confirm eligibility with a Centre of Excellence. Financial entitlements summarised from public policy statements and may change. This is not official government guidance.
How we counted this
Europe PMC query (preferred label + any corrected label + Orphanet and Mondo exact synonyms, stoplisted; unioned with resolved MeSH labels when available). UMLS / OMIM / NCIT cross-references are stored on the overview but are not added to the query string.
"Primary cutaneous marginal zone B-cell lymphoma" OR "PCMZL" OR "C-MALT" OR "Primary cutaneous marginal zone B cell lymphoma of mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone B cell lymphoma of the mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone B-cell lymphoma of the mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone lymphoma of mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone lymphoma of the mucosa-associated lymphoid tissue" OR "cutaneous Immunocytoma" OR "marginal zone B cell lymphoma of skin" OR "marginal zone B cell lymphoma of the skin" OR "salt lymphoma" OR "skin-associated lymphoid tissue lymphoma"
ClinicalTrials.gov query (quoted phrases + MeSH via query.cond, plus recall-expansion terms when used):
"Primary cutaneous marginal zone B-cell lymphoma" OR "PCMZL" OR "C-MALT" OR "Primary cutaneous marginal zone B cell lymphoma of mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone B cell lymphoma of the mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone B-cell lymphoma of the mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone lymphoma of mucosa-associated lymphoid tissue" OR "Primary cutaneous marginal zone lymphoma of the mucosa-associated lymphoid tissue" OR "cutaneous Immunocytoma" OR "marginal zone B cell lymphoma of skin" OR "marginal zone B cell lymphoma of the skin" OR "salt lymphoma" OR "skin-associated lymphoid tissue lymphoma"
Study-type breakdown: 0 interventional · 0 observational · 0 expanded access. Only interventional studies enter the trial headline.
Query health: ok — strategies attempted: phrase; with hits: phrase
Run this search on ClinicalTrials.gov
Confidence reasoning
- Preferred label is multi-word and distinctive
- No synonyms dropped by stoplist
- No label/synonym collisions with other diseases in this corpus
Ingested 2026-07-27T08:55:18.112Z