title: Large adrenal oncocytoma with uncertain malignant potential: case report and review of literature.
abstract: OBJECTIVE
  To report a case of oncocytoma, a relatively rare adrenal tumor, which most commonly is detected as an adrenal incidentaloma.
  
  
  METHODS
  We present a case report, including laboratory, imaging, and pathologic findings, of a 47-year-old obese woman who had hypertension and an incidentally found large, left adrenal mass.
  
  
  RESULTS
  On the basis of the hormonal evaluation, this mass was a nonsecreting adrenal tumor, which histologically proved to be an oncocytoma with borderline malignant characteristics. A collective analysis of the few cases of adrenal oncocytoma published in the medical literature showed that our case corresponded to the previously published cases in preponderant location (left side) as well as the general size (11.4 cm in the largest dimension) and weight (372 g).
  
  
  CONCLUSIONS
  Adrenal oncocytoma should be included in the differential diagnosis of adrenal incidentalomas, especially if large tumors are detected. In addition, a longterm follow-up is suggested because there are no certain clues about the true potential of this tumor.
authors.affiliation: Endocrine Unit, Second Department of Internal Medicine-Propaedeutic, Research Institute and Diabetes Center, Athens University Medical School, Attikon University Hospital, Athens, Greece. molypepa@otenet.gr
authors.forename: Melpomeni
authors.initials: M
authors.lastname: Peppa
authors.forename: Evi
authors.initials: E
authors.lastname: Karamitopoulou
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Nikolopoulos
authors.forename: Georgios
authors.initials: G
authors.lastname: Peros
authors.forename: Theofanis
authors.initials: T
authors.lastname: Economopoulos
authors.forename: Sotirios A
authors.initials: SA
authors.lastname: Raptis
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Hadjidakis
mesh_terms: D018249:Adenoma, Oxyphilic / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D000310:Adrenal Gland Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D018246:Adrenocortical Adenoma / Q000150:complications / Q000175:diagnosis / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006973:Hypertension / Q000150:complications; D033162:Incidental Findings; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009765:Obesity / Q000150:complications; D011230:Precancerous Conditions / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D014057:Tomography, X-Ray Computed