• Cholesterol crystal embolism, sometimes separately designated atheroembolism, is an increasing and still underdiagnosed cause of renal dysfunction antemortem in elderly patients. Renal cholesterol crystal embolization, also known as atheroembolic renal disease, is caused by showers of cholesterol crystals from an atherosclerotic aorta that occlude small renal arteries. Although cholesterol crystal embolization can occur spontaneously, it is increasingly recognized as an iatrogenic complication from an invasive vascular procedure, such as manipulation of the aorta during angiography or vascular surgery, and after anticoagulant and fibrinolytic therapy. Cholesterol crystal embolism may give rise to different degrees of renal impairment. Some patients show only a moderate loss of renal function; in others, severe renal failure requiring dialysis ensues. An acute scenario with abrupt and sudden onset of renal failure may be observed. More frequently, a progressive loss of renal function occurs over weeks. A third clinical form of renal atheroemboli has been described, presenting as chronic, stable, and asymptomatic renal insufficiency. The renal outcome may be variable; some patients deteriorate or remain on dialysis, some improve, and some remain with chronic renal impairment. In addition to the kidneys, atheroembolization may involve the skin, gastrointestinal system, and central nervous system. Renal atheroembolic disease is a difficult and controversial diagnosis for the protean extrarenal manifestations of the disease. In the past, the diagnosis was often made postmortem. However, in the last decade, awareness of atheroembolic renal disease has improved, enabling us to make a correct premortem diagnosis in a number of patients. Correct diagnosis requires the clinician to be alert to the possibility. The typical patient is a white man aged older than 60 years with a baseline history of hypertension, smoking, and arterial disease. The presence of a classic triad characterized by a precipitating event, acute or subacute renal failure, and peripheral cholesterol crystal embolization strongly suggests the diagnosis. The confirmatory diagnosis can be made by means of biopsy of the target organs, including kidneys, skin, and the gastrointestinal system. Thus, Cinderella and her shoe now can be well matched during life. Patients with renal atheroemboli have a dismal outlook. A specific treatment is lacking. However, it is an important diagnosis to make because it may save the patient from inappropriate treatment. Finally, recent data suggest that an aggressive therapeutic approach with patient-tailored supportive measures may be associated with a favorable clinical outcome.

In iron-replete HD patients treated with rHuEpo in the maintenance phase, Kt/V exerts a significant sparing effect on rHuEpo requirement independent of the use of biocompatible synthetic membranes. By optimizing rHuEpo responsiveness, an adequate dialysis treatment can contribute to the reduction of the costs of rHuEpo therapy.

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ObjectiveTo evaluate the efficacy and safety in the long term of a retreatment regimen with Rituximab (RTX) alone administered at clinical relapse in cryoglobulinemic vasculitis (CV). Methods Thirty patients with severe HCV-related CV, previously enrolled in the multicentre Italian trial on RTX in the treatment of CV, were retrospectively evaluated after the end of the trial. All of them were managed with RTX alone at clinical relapse, if any. Disease activity at the last available follow up was defined as complete remission (absence of active disease), partial remission (response > 50% of at least one manifestation among glomerulonephritis, peripheral neuropathy or skin ulcers) or active disease. ResultsThe mean follow up after the first RTX cycle was 72.6 (20.4) months. After the end of the trial, 21/30 (70%) patients showed an active follow up [81.7 (10.9) months)], 3/30 (10%) lost follow up and 6/30 (20%) died. 12/21 (57.1%) patients were in complete disease remission, 5/21 (23.8%) showed a partial response and 4/21 (19%) had an active disease. 17/30 (56.7%) patients needed retreatment for relapse with a mean time to retreatment of 22.3 (12.1) months. Treatment survival of this regimen was 7.6 (0.3) years. Recurrent non-severe infections occurred in 3/30, with chronic hypogammaglobulinemia in 2/3 patients. Conclusions A long-term regimen of retreatment with RTX alone given at clinical relapse seems to be effective and safe in CV, with a low rate of infections and severe hypogammaglobulinemia. IntroductionCryoglobulinemic vasculitis (CV) is a systemic vasculitis, usually triggered by HCV infection [1], and characterized by an expansion of oligo-monoclonal B cells that produce IgM with rheumatoid factor (RF) activity, which can lead to the formation of immune complexes consisting of RF, HCV and polyclonal HCVspecific IgG, precipitating in blood vessel walls or glomerular capillaries. CV is characterized by the typical clinical triad of purpura, weakness, and arthralgia and often by severe organ involvement including glomerulonephritis, peripheral neuropathy, and skin ulcer [2]. Treatment of HCV-related CV may target either the viral trigger or the downstream B cell arm of autoimmunity. Anti-viral therapy has a strong rationale, is effective in many milder cases, but it may also prove ineffective, contraindicated, or not tolerated, and sometimes may worsen CV. The new direct acting antiviral drugs for HCV are being investigated in HCV-related CV. Importantly, antiviral treatment is presently not the first choice, based on clinical priorities, in HCV-positive patients with severe CV organ involvement [3], [4], [5], [6], [7] and [8]. Rituximab (RTX) is an anti CD20 monoclonal antibody, which depletes the expanded population of B cells, and proved to be an effective strategy in CV. Recently, two independent controlled randomized trials reported a large efficacy and good safety of RTX in severe manifestations of CV [9] and [10]. In the Italian study, 59 patients with severe manifestations of CV (skin ulcer...