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    Dilated cardiomyopathy in a patient with antibody-negative Goodpasture's syndrome and pulmonary relapse.
    (2010) Solak Y.; Selcuk N.Y.; Polat I.; Atalay H.; Turkmen K.
    The Goodpasture's syndrome, also known as anti-GBM disease, is an uncommon disease, responsible for 20% of all cases of rapidly progressive glomerulonephritis. Anti-GBM antibodies are directed against non-collagenous domain (NC-1) of the alpha-3 chain of type IV collagen. When conventional ELISA assays are used, these antibodies can be detected in almost all the patients. Nevertheless, some reports have described antibody-negative relapsing disease. Some aggravating factors, namely, smoking, pulmonary infection and hypervolemia, may expose embedded antigenic target and may be responsible for the relapse. In addition, these antibody-negative relapses also respond to standard treatment, which comprises of plasma exchange, pulse steroids and cyclophosphamide. Herein, we report a patient who presented at the Selcuk University Meram School of Medicine, Meram, Konya, Turkey, with the pulmonary-renal syndrome. He was also found to have idiopathic dilated cardiomyopathy (DCM). To our knowledge, this is the first report describing co-existence of DCM and anti-GBM disease. There is growing evidence showing strong relation of both DCM and anti-GBM disease with HLA. Although not proven, this might have occurred in our patient. In our opinion, volume overload was facilitated by anuria and DCM and led to an antibody-negative pulmonary relapse. The relapse was treated just as the first episode and the patient improved satisfactorily.