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PubMed This is a summary of 15 peer-reviewed journal articles Updated
Rheumatology

The 3 Types and Their Causes

At a Glance

Cryoglobulinemic vasculitis is usually triggered by an underlying condition. It is divided into three types: Type I is often caused by blood disorders, while Types II and III (mixed cryoglobulinemia) are most commonly driven by Hepatitis C or autoimmune diseases like Sjögren's syndrome.

Cryoglobulinemic vasculitis (CV) is rarely a “standalone” disease. Instead, it usually acts as a messenger, signaling that another condition in your body is causing your immune system to produce unusual proteins [1][2].

To find the cause, doctors use the Brouet classification, which divides cryoglobulins into three types based on the specific “recipe” of proteins in your blood [3]. Knowing your type is the key to understanding why you have this condition and how it should be treated.

Type I: The “Obstruction” Type

In Type I cryoglobulinemia, your blood contains a single, identical type of antibody called a monoclonal immunoglobulin [1][4].

Unlike the other types, Type I doesn’t always cause inflammation through the immune system’s “alarm.” Instead, the proteins are so uniform and numerous that they can physically “clog” small blood vessels, similar to how slush can clog a pipe [1][5].

Common underlying causes for Type I include:

  • Waldenström macroglobulinemia: A rare type of slow-growing blood cancer [6].
  • Multiple Myeloma: A cancer of the plasma cells in the bone marrow [7].
  • Monoclonal Gammopathy of Undetermined Significance (MGUS): A condition where the body makes an abnormal protein, which may (but doesn’t always) lead to cancer later [8].

Types II & III: The “Mixed” Types

Types II and III are known as mixed cryoglobulinemia because they contain a mixture of different antibodies (IgG and IgM) that have latched onto each other to form “complexes” [3][5]. These complexes are what trigger the inflammation and vasculitis [1].

Type II (Monoclonal + Polyclonal)

In Type II, one antibody is monoclonal (identical), and the other is polyclonal (varied). This type is the most common form associated with significant vasculitis symptoms like skin rashes and kidney issues [9].

Type III (Polyclonal + Polyclonal)

In Type III, all the antibodies involved are varied (polyclonal). This type is often seen in chronic inflammatory conditions where the immune system is constantly “turned on” [10].

Common underlying causes for Mixed (II & III) include:

  • Hepatitis C (HCV): This is the most frequent driver. Up to 90% of people with mixed cryoglobulinemia have been exposed to Hepatitis C [9][11]. The virus triggers a constant immune response that eventually produces cryoglobulins [12].
  • Autoimmune Diseases: Conditions like Sjögren’s syndrome, Systemic Lupus Erythematosus (SLE), and Rheumatoid Arthritis can cause the body to produce these mixed proteins [10][13].
  • Other Infections: While rarer, other chronic infections like Hepatitis B or even certain bacterial infections can be the trigger [14].

Summary of the Three Types

Feature Type I Type II Type III
Protein Type Monoclonal Mixed (Monoclonal + Polyclonal) Mixed (Polyclonal + Polyclonal)
Main Mechanism Physical blockage (obstruction) [1] Immune complex inflammation [1] Immune complex inflammation [5]
Primary Causes Blood cancers, bone marrow disorders [6] Hepatitis C (most common), B-cell disorders [9] Autoimmune diseases, chronic infections [10]

If your doctors haven’t identified an underlying cause after thorough testing, they may refer to your condition as essential cryoglobulinemia, meaning the cause is currently unknown [15].

Common questions in this guide

What is the difference between Type I, II, and III cryoglobulinemia?
Type I involves a single type of identical protein that can physically clog blood vessels. Types II and III are mixed cryoglobulinemia, where a combination of different proteins trigger an immune response that inflames the blood vessels.
How is Hepatitis C related to cryoglobulinemic vasculitis?
Hepatitis C is the most common cause of mixed cryoglobulinemia, particularly Type II. The viral infection triggers a constant immune response in the body, which eventually leads to the production of the abnormal proteins that cause blood vessel inflammation.
What causes Type I cryoglobulinemia?
Type I is typically caused by underlying blood cancers or bone marrow disorders. Common triggers include Waldenström macroglobulinemia, multiple myeloma, and a precancerous condition known as MGUS.
Why might my doctor order a bone marrow biopsy if I have cryoglobulinemia?
If your blood work shows a monoclonal spike, which is a hallmark of Type I cryoglobulinemia, your doctor may order a bone marrow biopsy. This test helps check for underlying blood disorders or cancers that could be driving your condition.
What does it mean if I am diagnosed with essential cryoglobulinemia?
Essential cryoglobulinemia is the term used when doctors cannot find an underlying cause for your vasculitis after thorough testing. It simply means the exact trigger for your abnormal blood proteins remains unknown.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Which of the three types (Type I, II, or III) was identified in my blood work?
  2. 2.Do my tests show a 'monoclonal spike,' and if so, do I need a bone marrow biopsy to look for an underlying blood disorder?
  3. 3.Have I been screened for the Hepatitis C virus (HCV) and other chronic infections?
  4. 4.Are there signs of an autoimmune disease, like Sjögren's syndrome or Lupus, that could be driving my Type III cryoglobulinemia?
  5. 5.Since mixed cryoglobulinemia can sometimes lead to lymphoma, what is our long-term plan for monitoring my B-cell levels?

Questions For You

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References

References (15)
  1. 1

    Cryoglobulinemia: An update in 2019.

    Desbois AC, Cacoub P, Saadoun D

    Joint bone spine 2019; (86(6)):707-713 doi:10.1016/j.jbspin.2019.01.016.

    PMID: 30731128
  2. 2

    Infective Endocarditis Observed With Cryoglobulinemic Vasculitis.

    Liu K, Newman A

    Cureus 2020; (12(9)):e10620 doi:10.7759/cureus.10620.

    PMID: 33123433
  3. 3

    Cryoglobulin Test and Cryoglobulinemia Hepatitis C-Virus Related.

    Gulli F, Santini SA, Napodano C, et al.

    Mediterranean journal of hematology and infectious diseases 2017; (9(1)):e2017007 doi:10.4084/MJHID.2017.007.

    PMID: 28101312
  4. 4

    Cryoglobulinemia Vasculitis.

    Cacoub P, Comarmond C, Domont F, et al.

    The American journal of medicine 2015; (128(9)):950-5.

    PMID: 25837517
  5. 5

    Cryoglobulins: An update on detection, mechanisms and clinical contribution.

    Kolopp-Sarda MN, Miossec P

    Autoimmunity reviews 2018; (17(5)):457-464 doi:10.1016/j.autrev.2017.11.035.

    PMID: 29526627
  6. 6

    Cryocrystalglobulinemia Leading to Multi-Organ Failure in Chronic Lymphocytic Leukemia Achieving Complete Renal Recovery.

    Dunton A, Jain S

    Journal of hematology 2023; (12(6)):287-293 doi:10.14740/jh1212.

    PMID: 38188472
  7. 7

    The Pivotal Role of Viruses in the Pathogeny of Chronic Lymphocytic Leukemia: Monoclonal (Type 1) IgG K Cryoglobulinemia and Chronic Lymphocytic Leukemia Diagnosis in the Course of a Human Metapneumovirus Infection.

    Barben J, Putot A, Mihai AM, et al.

    Viruses 2021; (13(1)) doi:10.3390/v13010115.

    PMID: 33466993
  8. 8

    Understanding hairy cell leukemia in the context of mature B-cell neoplasms: tumor microenvironment and extracellular vesicle contribution to disease pathogenesis.

    Ingangi V, Amoroso D, Passaro E, et al.

    Frontiers in immunology 2026; (17()):1741794 doi:10.3389/fimmu.2026.1741794.

    PMID: 41789071
  9. 9

    Managing refractory cryoglobulinemic vasculitis: challenges and solutions.

    Ostojic P, Jeremic IR

    Journal of inflammation research 2017; (10()):49-54 doi:10.2147/JIR.S114067.

    PMID: 28507447
  10. 10

    Recent updates in the diagnosis and management of cryoglobulinemic vasculitis.

    Treppo E, Quartuccio L, De Vita S

    Expert review of clinical immunology 2023; (19(12)):1457-1467 doi:10.1080/1744666X.2023.2249609.

    PMID: 37698547
  11. 11

    Clinical and Serological Profiles in Cryoglobulinemia: Analysis of Isotypes and Etiologies.

    Codes-Méndez H, Jeria S, Park HS, et al.

    Journal of clinical medicine 2024; (13(20)) doi:10.3390/jcm13206069.

    PMID: 39458019
  12. 12

    HCV-associated B-cell non-Hodgkin lymphomas and new direct antiviral agents.

    Carrier P, Jaccard A, Jacques J, et al.

    Liver international : official journal of the International Association for the Study of the Liver 2015; (35(10)):2222-7 doi:10.1111/liv.12897.

    PMID: 26104059
  13. 13

    Resistant type II cryoglobulinaemic vasculitis successfully treated with bortezomib in a patient with SLE.

    Dutton K, Savic S, Owen R, Vital E

    BMJ case reports 2019; (12(1)) doi:10.1136/bcr-2018-226083.

    PMID: 30612104
  14. 14

    Cryoglobulinaemia.

    Roccatello D, Saadoun D, Ramos-Casals M, et al.

    Nature reviews. Disease primers 2018; (4(1)):11 doi:10.1038/s41572-018-0009-4.

    PMID: 30072738
  15. 15

    Idiopathic Mixed Cryoglobulinemia: A Diagnostic Challenge.

    Rathi H, Patra T, Poojary I, et al.

    Cureus 2024; (16(9)):e70069 doi:10.7759/cureus.70069.

    PMID: 39449949

This page explains the types and causes of cryoglobulinemic vasculitis for educational purposes. Always consult your rheumatologist or hematologist to understand your specific diagnosis, lab results, and underlying conditions.

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