title: Ultrastructural evaluation of renal cell oncocytomas.
abstract: The utility of ultrastructural evaluation of eosinophilic renal cell neoplasms is illustrated by two case studies. The differential diagnosis between granular renal cell carcinoma and renal cell oncocytoma may be difficult. Ultrastructural demonstration of the presence of abundant mitochondria is useful in the definitive diagnosis of fine-needle aspiration specimens, those neoplasms with nuclear pleomorphism, or in patients requiring renal parenchymal sparing surgery.
authors.affiliation: Department of Laboratory Medicine, University of South Dakota School of Medicine, Sioux Falls 57105-1570, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Simmons
authors.forename: R A
authors.initials: RA
authors.lastname: Jaqua
authors.forename: K G
authors.initials: KG
authors.lastname: Peterson
mesh_terms: D000368:Aged; D002292:Carcinoma, Renal Cell / Q000145:classification / Q000473:pathology / Q000648:ultrastructure*; D005260:Female; D006651:Histocytochemistry; D006801:Humans; D007680:Kidney Neoplasms / Q000145:classification / Q000473:pathology / Q000648:ultrastructure*; D008297:Male