title: Rheumatoid granuloma of kidney.
abstract: A seventy-year-old black man with long-standing rheumatoid arthritis who had been treated with corticoids presented with painless hematuria originating from the kidney. The clinical findings were suggestive of a renal cell carcinoma. The resected kidney was markedly enlarged, scarred, and disclosed a necrotic rheumatoid granuloma surrounded by chronic inflammatory reaction. The mechanism of hematuria and the clinical significance of the rheumatoid granulomatous involvement of the kidney are discussed.
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000150:complications; D006099:Granuloma / Q000209:etiology / Q000473:pathology*; D006801:Humans; D007674:Kidney Diseases / Q000209:etiology* / Q000473:pathology*; D008297:Male; D012216:Rheumatic Diseases / Q000209:etiology / Q000473:pathology*