title: Renal cell carcinoma with unusual differentiation.
abstract: A 4-cm tumor in the kidney of a 67-year-old male was focally a classical renal cell carcinoma with a papillary architecture and clear cells, but most of the tumor had an unusual pattern composed of paired sheets of cuboidal to flattened cells reminiscent of the loop of Henle.
authors.affiliation: Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston 77030, USA.
authors.forename: N G
authors.initials: NG
authors.lastname: Ordóñez
authors.forename: B
authors.initials: B
authors.lastname: Mackay
mesh_terms: D000368:Aged; D002292:Carcinoma, Renal Cell / Q000473:pathology* / Q000648:ultrastructure; D002454:Cell Differentiation; D006801:Humans; D007680:Kidney Neoplasms / Q000473:pathology* / Q000648:ultrastructure; D008297:Male