Interstitial nephritis and high titers of PR3-ANCA: an unusual manifestation of ANCA-associated disease.

We present the case of a 75-year-old female with weight loss, anemia, systemic signs of inflammation, mild renal insufficiency, microscopic hematuria, mixed glomerular and tubular proteinuria, and high titers of PR3-ANCA. Renal biopsy demonstrated interstitial nephritis with some sclerosed but otherwise normal glomeruli. Extensive work-up showed no signs of granulomatous inflammation or other vasculitic organ involvement. We presumed this to be a rare renal manifestation of ANCA-associated disease with the presence of sclerosed glomeruli suggesting a previous history of glomerular involvement. In view of the absence of active vasculitic or granulomatous disease, treatment was limited to low-dose corticosteroids with good response.

Apheresis in lupus nephritis.

Systemic lupus erythematosus is a chronic autoimmune disease which commonly involves the kidneys. Despite great improvement in survival over the past years due to immunosuppressive therapy, renal failure remains an important cause of morbidity and mortality. In view of the pathogenesis of lupus nephritis, the use of less toxic and more specific ways of treatment such as the extracorporeal removal of pathogenetically relevant autoantibodies seems rational. On the basis of currently available studies, plasma exchange used alone or as an adjunct to conventional immunosuppressive therapy offers no clear benefit over standard immunosuppression in patients with active lupus nephritis and therefore cannot be recommended. However, although not proven, plasmapheresis might be beneficial in patients with acute life-threatening disease, for which high-dose immunosuppressive therapy may not be possible, or as an adjunct procedure for patients not responding to conventional therapy. Rather than the unselective removal of plasma, adsorption procedures allow the selective or specific removal of immunoglobulins, which seems to be a more reasonable approach in lupus nephritis. The results of the first clinical trials using different adsorption columns seem promising, but their use cannot be recommended until well-designed, case-controlled studies have been performed to prove their usefulness and cost effectiveness in lupus nephritis. So far, clear-cut recommendations regarding type of adsorption column, intensity and duration of treatment, and accompanying immunosuppressive treatment cannot be given.

Therapeutic plasma exchange in the intensive care setting.

The potential to treat life-threatening conditions with therapeutic plasma exchange (TPE) is limited to a few situations. In severe pulmonary hemorrhage as a complication of several immune disorders (e.g., antiglomerular basement membrane antibody disease, Wegener's granulomatosus, lupus erythematosus), TPE should only be considered after conventional measures (mostly pulses of methylprednisolone) have been applied. Idiopathic familial and nonfamilial thrombotic thrombocytopenic purpura as well as the subset of the hemolytic uremic syndrome not associated with diarrhea are clear indications for TPE using fresh frozen plasma as replacement fluid. Patients with myasthenic crisis will also benefit from TPE and will improve within 1 day. Acute pancreatitis as a complication of the chylomicronemia syndrome has a poor prognosis and should be treated with TPE without any delay. In the case of drug overdose or intoxication, the efficiency of TPE to remove the offending drug is usually overestimated. In this situation, TPE is useful only when the plasma protein binding of the substance is high (>80%) and the volume of distribution is low (<0.2 L/kg body weight). TPE is not without risks and hazards (e.g., vascular access, bleeding, allergy), which should also be considered when discussing this extracorporeal therapy in otherwise refractory clinical conditions.

[Wegener granulomatosis and microscopic polyangiitis. Diagnostic and clinical results in 54 patients with long-term follow-up]. / Wegener Granulomatose und mikroskopische Polyangiitis: Diagnostische und klinische Ergebnisse bei 54 Patienten im Langzeitverlauf.

BACKGROUND AND OBJECTIVE: Wegener's granulomatosis (WG) and microscopic polyangiitis (MPA) are primary necrotizing ANCA associated systemic vasculitides with preferential involvement of small and medium-sized vessels. It was the aim of this study to evaluate retrospectively data regarding diagnostic and clinical features collected over a long period on patients with WG and MPA at one medical centre. Additionally, the question was addressed whether both diseases are being more frequently diagnosed since the introduction of serological tests for ANCA. PATIENTS AND METHODS: The files of all patients with WG (n = 48) and MPA (n = 6) seen between 1976 and 1997 by our nephrology team were evaluated with respect to clinical presentation (signs and symptoms, outcome, complications) and relevant laboratory data (e.g. blood count, ESR, renal function, CRP, ANCA). RESULTS: Five of 48 patients with WG (24 males, 24 females, 22-67 and 18-77 years) had been diagnosed with the disease in the first 10 years before and 43 after ANCA serology became available. All MPA cases (6 males) had been diagnosed after 1992 and showed renal involvement. The pattern of organ involvement in this cohort with WG was the same as that recorded in the literature. Laboratory tests revealed raised ESR in 85%, anemia in 79%, ANCAs in 91% and increased CRP in 73%. A localized form of WG had been present in 15% of patients, the generalized in 85%. Treatment of the generalized form largely followed the Fauci scheme, achieving remission in 97%. After one year of immunosuppressive treatment 93% of patients with WG were still alive, 74% after 5 years. CONCLUSION: This is the first report in Central Europe to have analysed data on patients with WG and MPA, followed up for 20 years at one centre. There were no significant differences in the pattern of organ involvement, results of treatment and prognosis from previously published multicenter studies. Our data demonstrate that the diagnosis of WG has been more frequently made since the introduction of immunological tests for ANCA.