title: Telangiectatic oncocytoma: a previously undescribed variant of renal oncocytoma.
abstract: OBJECTIVE
  To identify, describe, and investigate the clinical, radiologic, and pathologic features of 8 cases of telangiectatic oncocytoma.
  
  
  METHODS
  Fifty-three consecutive renal oncocytomas were reviewed for the telangiectatic pathologic features that were subsequently correlated with the demographic, clinical, and radiographic findings.
  
  
  RESULTS
  Telangiectatic oncocytoma accounted for 15% of the 53 renal oncocytomas collected in the past 7 years in our institution. On radiology, almost all presented as an enhancing mass and were suspicious for or consistent with a renal malignant tumor. Grossly, the tumors ranged from 2.4 to 6.0 cm (mean, 3.5 cm) and macroscopically were hemorrhagic spongy or multicystic masses without a central stellate scar. Microscopically, they were characterized by variably sized blood-distended spaces (<0.1-mm to 2- to 3-mm blood lakes) lined by typical oncocytoma cells and without evidence of degenerative changes.
  
  
  CONCLUSIONS
  With its unique radiologic and pathologic presentations in comparison with classic renal oncocytoma, it is important to recognize this new variant of renal oncocytoma.
authors.affiliation: Dept of Pathology, Mount Sinai School of Medicine, One Gustave L. Levy Place, Box 1194, New York, NY 10029, USA. guang-qian.xiao@mountsinai.org
authors.forename: Guang-Qian
authors.initials: GQ
authors.lastname: Xiao
authors.forename: Huai-Bin Mabel
authors.initials: HB
authors.lastname: Ko
authors.forename: Pamela
authors.initials: P
authors.lastname: Unger
mesh_terms: D018249:Adenoma, Oxyphilic / Q000098:blood supply / Q000000981:diagnostic imaging / Q000473:pathology*; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000378:metabolism*; D003710:Demography; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D017678:Sex Distribution; D013684:Telangiectasis / Q000000981:diagnostic imaging / Q000473:pathology*; D014057:Tomography, X-Ray Computed
chemical_list: D014408:Biomarkers, Tumor
keywords: Cystic; Oncocytoma; Renal; Telangiectatic