Renal paraneoplastic vasculitis complicating lung adenocarcinoma.

Renal paraneoplastic vasculitis (RNPV) is rare. It can be revealed by glomerulonephritis, microaneurysms or renal failure. RPNV may precede the onset of the primary tumor, and treatment and prognosis depend on the etiology (primary tumor). A 54-year-old man who had a primary lung adenocarcinoma was admitted for nephrotic syndrome. The investigations revealed RNPV. The patient was treated with corticosteroids at high dose and cyclophosphamide with improvement of the renal condition; however, the patient died from worsening of his pulmonary neoplasia.