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The Expanding Spectrum of Clinical Features in HCV-Related Mixed Cryoglobulinemia

  • Clodoveo Ferri
  • Alessandro Antonelli
  • Marco Sebastiani
  • Michele Colaci
  • Anna Linda Zignego
Chapter

Abstract

Mixed cryoglobulinemia (MC) is a relatively rare disorder that may complicate numerous infectious or immuno/hematological diseases. Classical MC syndrome is associated with hepatitis C virus (HCV) infection in the large majority of patients and the virus is suspected in the etiopathogenesis of the disease. MC syndrome, or cryoglobulinemic vasculitis, is characterized by a clinical triad of purpura, weakness, and arthralgias and by variable organ and, in many cases, endocrine involvement. As a late complication, some patients develop malignancies, particularly B-cell lymphomas and/or hepatocellular carcinoma. To date, there are no available diagnostic criteria for MC, but classification criteria must account for its serological and clinical hallmarks. Leukocytoclastic vasculitis, especially of the small blood vessels, is the typical pathological finding of affected tissues. An important pathogenetic step in MC is HCV lymphotropism, which is responsible for poly/oligoclonal B-lymphocyte expansion. The consequence is a wide production of different autoantibodies and immune complexes, mainly cryoglobulins, responsible for organ- and non-organ-specific immunological alterations. Thus, MC, characterized by the simultaneous presence of autoimmune and lymphoproliferative diseases, is the crossroads of these disorders and represents the prototype of HCV-associated pathologies. The oncogenic potential of HCV is demonstrated by several studies showing its pathogenetic link with some malignancies, particularly the hepatocellular carcinoma and B-cell lymphomas. HCV-related disorders have a heterogeneous geographical distribution, suggesting other important genetic and/or environmental co-factors. Although the majority of individuals with chronic HCV infection exhibit hepatic manifestations only or are totally asymptomatic, a not negligible percentage develop autoimmune and/or lymphoproliferative/neoplastic disorders through a multifactorial and multistep pathogenetic process, reflected by the name “HCV syndrome.”

Keywords

Autoimmune Hepatitis Mixed Cryoglobulinemia Porphyria Cutanea Tarda Extrahepatic Manifestation Cryoglobulinemic Vasculitis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Italia 2012

Authors and Affiliations

  • Clodoveo Ferri
    • 1
  • Alessandro Antonelli
    • 2
  • Marco Sebastiani
    • 1
  • Michele Colaci
    • 1
  • Anna Linda Zignego
    • 3
  1. 1.Rheumatology Unit, Department of Internal MedicineUniversity of Modena and Reggio Emilia, Medical SchoolModenaItaly
  2. 2.Metabolism Unit, Department of Internal MedicineUniversity of Pisa Medical SchoolPisaItaly
  3. 3.Department of Internal MedicineUniversity of Florence Medical SchoolFlorenceItaly

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