title: Inflammatory pseudotumor of the spleen concomitant with renal cell carcinoma: case report.
abstract: BACKGROUND
  Inflammatory pseudotumor is a rare benign lesion that can occur at a wide variety of primary sites. It is usually worrisome for the patient and the medical staff, since it cannot be clinically or radiologically distinguished from malignant entities.
  
  
  METHODS
  We report on a case of splenic inflammatory pseudotumor presenting with concomitant renal cell carcinoma. Despite the alarming macroscopic appearance of pseudotumors, their microscopic features usually confirm the inflammatory nature of such lesions. Evidence regarding the etiology of pseudotumors is still lacking, but hypotheses have been created.
authors.affiliation: Department of Pathology, Mie University School of Medicine, Mie, Japan. soioshii@bsi.com.br
authors.forename: Sérgio Ossamu
authors.initials: SO
authors.lastname: Loshii
authors.forename: Danielle Giacometti
authors.initials: DG
authors.lastname: Sakamoto
authors.forename: Tiago Noguchi
authors.initials: TN
authors.lastname: Machuca
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Yatani
mesh_terms: D000368:Aged; D002292:Carcinoma, Renal Cell / Q000473:pathology*; D003937:Diagnosis, Differential; D006104:Granuloma, Plasma Cell / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D007680:Kidney Neoplasms / Q000473:pathology*; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010784:Photomicrography; D013158:Splenic Diseases / Q000473:pathology*; D014057:Tomography, X-Ray Computed