Intravascular large B-cell lymphoma is a rare form of large B-cell lymphoma in which the cancer cells grow inside small blood vessels rather than forming lumps, so it causes fevers, confusion, skin patches or breathlessness and is often found late or only after death. Rituximab-based chemotherapy with drugs that reach the brain has turned a nearly always fatal disease into one often controlled.
WHO-HAEM5 lists intravascular large B-cell lymphoma among the large B-cell lymphomas as an entity defined by selective growth of tumour cells within the lumina of small vessels, with a Western variant dominated by neurological and skin involvement and an Asian variant with haemophagocytic syndrome, marrow involvement and cytopenias (Alaggio 2022). In 182 published cases, one- and three-year overall survival were 42.3 and 11.5 percent with a median of 340 days; rituximab-containing regimens lengthened overall survival (450 against 180 days) and progression-free survival, while blood-brain-barrier-penetrating drugs gave no extra benefit for disease already in the central nervous system (Cancer Management and Research 2020). The Japanese phase 2 PRIMEUR-IVL trial gave R-CHOP with high-dose methotrexate and intrathecal chemotherapy to prevent central nervous system relapse in untreated patients without central nervous system disease (Shimada 2020, linked here).
How it differs from its parent: no mass and usually no lymphadenopathy, so diagnosis rests on random skin biopsy, marrow or organ biopsy; frequent central nervous system relapse, so prophylaxis is built into first-line treatment; and a high rate of haemophagocytic syndrome in the Asian variant.
How common: no registry figure; 182 published cases in a decade (Cancer Management and Research 2020).
Treatment: R-CHOP with central nervous system-directed therapy (high-dose methotrexate and intrathecal chemotherapy) as in PRIMEUR-IVL; autologous transplant considered in first remission for fit patients; central nervous system disease treated as on the primary CNS lymphoma page.
Very rare: a review of the world literature over 2008 to 2018 found 182 pathologically confirmed cases in 103 publications (Cancer Management and Research 2020). No registry figure exists.
Leukaemias, myeloma and MDS live in the marrow and blood; lymphomas grow in lymph nodes and spleen. The node stations are the disease map, not a route of spread, and staging counts them.
In lymphoma the node stations are the disease itself; staging (Ann Arbor / Lugano) counts how many regions and sides of the diaphragm are involved.
Same organ: Extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma), Splenic marginal zone lymphoma, Nodal marginal zone lymphoma, Primary cutaneous marginal zone lymphoma, Primary cutaneous follicle centre lymphoma, Sezary syndrome, Nodal T-follicular helper cell lymphoma, angioimmunoblastic type (angioimmunoblastic T-cell lymphoma), Hepatosplenic T-cell lymphoma, Lymphomatoid granulomatosis, T-cell prolymphocytic leukaemia, Splenic B-cell lymphoma/leukaemia with prominent nucleoli (formerly B-cell prolymphocytic leukaemia and hairy cell leukaemia variant), T-cell large granular lymphocytic leukaemia, Mixed-phenotype acute leukaemia, Myeloid leukaemia of Down syndrome, Burkitt leukaemia, Marginal zone lymphoma, Cutaneous T-cell lymphoma (mycosis fungoides and Sezary syndrome), Primary mediastinal (thymic) large B-cell lymphoma, Leukaemia (all types), Acute myeloid leukaemia, Acute lymphoblastic leukaemia, Chronic lymphocytic leukaemia, Chronic myeloid leukaemia (CML), Diffuse large B-cell lymphoma, Follicular lymphoma, Hodgkin lymphoma, Mantle cell lymphoma, Multiple myeloma, Non-Hodgkin lymphoma (all types), Myelodysplastic syndromes / neoplasms (MDS), Myeloproliferative neoplasms (PV, ET, myelofibrosis), Polycythaemia vera (PV), Essential thrombocythaemia (ET), Waldenström macroglobulinaemia, Hairy cell leukaemia, Peripheral T-cell lymphomas (including cutaneous T-cell lymphoma), Blastic plasmacytoid dendritic cell neoplasm (BPDCN), Burkitt lymphoma, HIV-associated (AIDS-related) lymphomas, Chronic myelomonocytic leukaemia and MDS/MPN overlap neoplasms, Systemic mastocytosis, Erdheim-Chester disease, Rosai-Dorfman disease and other histiocytic neoplasms, Langerhans cell histiocytosis (LCH), Post-transplant lymphoproliferative disorder (PTLD), FLT3-mutated acute myeloid leukaemia, IDH1- and IDH2-mutated acute myeloid leukaemia, NPM1-mutated and KMT2A-rearranged acute myeloid leukaemia, Secondary and therapy-related acute myeloid leukaemia, Acute promyelocytic leukaemia, Acute myeloid leukaemia in older or unfit patients, Smouldering multiple myeloma, Newly diagnosed multiple myeloma, transplant-eligible, Newly diagnosed multiple myeloma, transplant-ineligible, Relapsed or refractory multiple myeloma, Plasma cell leukaemia, Lower-risk myelodysplastic syndromes, Higher-risk myelodysplastic syndromes, Chronic lymphocytic leukaemia, first treatment, Relapsed or refractory chronic lymphocytic leukaemia, Richter transformation of chronic lymphocytic leukaemia, Chronic myeloid leukaemia, chronic phase, Chronic myeloid leukaemia, accelerated and blast phase, Primary myelofibrosis, Standard-risk B-cell acute lymphoblastic leukaemia in children, High-risk acute lymphoblastic leukaemia in children (high-risk B-ALL and T-ALL), Philadelphia chromosome-positive acute lymphoblastic leukaemia in children (Ph-positive ALL), Philadelphia chromosome-like acute lymphoblastic leukaemia (Ph-like or BCR::ABL1-like ALL), Infant acute lymphoblastic leukaemia (KMT2A-rearranged, under one year), Relapsed and refractory acute lymphoblastic leukaemia in children, Acute myeloid leukaemia in children, Erdheim-Chester disease, Rosai-Dorfman-Destombes disease, Single-system Langerhans cell histiocytosis (bone, skin or one other organ), Multisystem Langerhans cell histiocytosis (with or without risk-organ involvement), Indolent and smouldering systemic mastocytosis, Advanced systemic mastocytosis (aggressive SM, SM with an associated haematological neoplasm, mast cell leukaemia), Early-stage classical Hodgkin lymphoma (stage I to II), Advanced-stage classical Hodgkin lymphoma (stage III to IV), Nodular lymphocyte-predominant Hodgkin lymphoma (nodular lymphocyte-predominant B-cell lymphoma), Relapsed and refractory classical Hodgkin lymphoma
R-CHOP with high-dose methotrexate and intrathecal chemotherapy (PRIMEUR-IVL); autologous transplant considered in first remission; CNS disease as on the primary CNS lymphoma page.
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Query for this cancer: (TITLE:"Intravascular large B-cell lymphoma" OR ABSTRACT:"Intravascular large B-cell lymphoma" OR TITLE:"IVLBCL" OR ABSTRACT:"IVLBCL" OR TITLE:"Intravascular lymphoma" OR ABSTRACT:"Intravascular lymphoma" OR TITLE:"Angiotropic large cell lymphoma" OR ABSTRACT:"Angiotropic large cell lymphoma" OR TITLE:"Malignant angioendotheliomatosis" OR ABSTRACT:"Malignant angioendotheliomatosis") AND (treatment OR therapy OR trial OR survival OR diagnosis). Results are unfiltered search hits about Intravascular large B-cell lymphoma, not a curated reading list.
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Bleeding that will not stop, black or bloody stools, or unexplained bruising when platelets are expected to be low.
High-dose methotrexate requires normal renal function, hydration, urine alkalinisation and leucovorin rescue with level monitoring.
A shortage of antibodies because treatment has wiped out the B cells or plasma cells that make them, as CD19 CAR-T, CD20 antibodies and BCMA therapies deliberately do. It leaves patients prone to infections, sometimes for years, and is managed with immunoglobulin infusions.
Reactions around the moment a drug is given: chills, fever or breathlessness from antibodies (infusion reactions), true allergy (hypersensitivity, rarely anaphylaxis), and leakage of a damaging drug into tissue around the vein (extravasation).
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