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Cryoglobulinemic vasculitis (CV) or mixed cryoglobulinemic syndrome (MCS) is a systemic small-vessel vasculitis characterized by the proliferation of B-cell clones producing pathogenic immune complexes, called cryoglobulins. It is often secondary to hepatitis C virus (HCV), autoimmune diseases, and hematological malignancies. CV usually has a mild benign clinical course, but severe organ damage and life-threatening manifestations can occur. Recently, evidence in favor of rituximab (RTX), an anti-CD 20 monoclonal antibody, is emerging in CV: nevertheless, questions upon the safety of this therapeutic approach, especially in HCV patients, are still being issued and universally accepted recommendations that can help physicians in MCS treatment are lacking. A Consensus Committee provided a prioritized list of research questions to perform a systematic literature review (SLR). A search was made in Medline, Embase, and Cochrane library, updated to August 2021. Of 1227 article abstracts evaluated, 27 studies were included in the SLR, of which one SLR, 4 RCTs, and 22 observational studies. Seventeen recommendations for the management of mixed cryoglobulinemia with rituximab from the Italian Study Group of Cryoglobulinemia (GISC) were developed to give a valuable tool to the physician approaching RTX treatment in CV., (© 2022. The Author(s).)

People with cryoglobulinaemic vasculitis (CV) have an increased risk of infections, attributed to different causes: impairment of the immune system due to the disease itself, comorbidities, and immunosuppressive therapy. Therefore, these patients may be at high risk for a more severe course of COVID-19, including hospitalisation and death. Concerns about efficacy, immunogenicity and safety of vaccines, as well as doubts, not yet fully clarified in patients with systemic autoimmune diseases, represent other important factors for a low vaccination rate in people with (CV). Indeed, providing an expert position on the issues related to SARS-CoV-2 vaccination in patients suffering from CV is of critical relevance in order to help both patients and clinicians who are treating them in making the best choice in each case. A multidisciplinary task force of the Italian Group for the Study of Cryoglobulinaemia (GISC) was convened, and through a Delphi technique produced provisional recommendations regarding SARS-CoV-2 vaccination in cryoglobulinaemic patients.

Background: Cryoglobulinemic vasculitis (CV) related to Hepatitis-B Virus (HBV) is rare and its treatment is ill-defined., Aims: To describe clinical and treatment characteristics of HBV-related CV patients. In addition, the efficacy of treatment with antiviral agent nucleotide (NUC), including Entecavir, Adefovir, and Lamivudine, was explored., Methods: In four Italian centres, 17 HBV-positive CV patients (median age 56 years, range 45-70) were enrolled., Results: The extrahepatic manifestations were: purpura (100%), arthralgias (71%), peripheral neuropathy (29%), chronic hepatitis (47%), liver cirrhosis (29%), and glomerulonephritis (18%). Mixed cryoglobulinemias were type II (88%) and type III (12%). The median cryocrit was 3% (range 1-14), rheumatoid factor was 200U/L (range 20-5850), C4 was 12mg/dl (range 2-31), ALT 71U/L (range 36-114). All patients were HBsAg-positive and 80% anti-HbeAg-positive. At enrollment, they were treated with steroids (eight), Entecavir (five), Alpha-IFN (two), Adefovir and Lamivudine (one each). After NUC treatment, no disease progression was observed and, in all patients, HBV-DNA became undetectable. Moreover, a regression of purpura and a reduction of cryocrit were observed. Four patients died during therapy, two of kidney failure and two of liver cirrhosis., Conclusion: NUC therapy appeared to be safe and effective in CV-related HBV., (Copyright © 2016 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.)