title: [Value of CT guided renal biopsies: retrospective review of 67 cases].
abstract: OBJECTIVE
  To assess the value of the CT guided percutaneous biopsy of renal tumors and to promote the interest of this procedure.
  
  
  METHODS
  We report a retrospective study of 67 patients (average age, 51 years) who underwent CT guided biopsy of a single renal mass. The average size of tumors was 5 centimeters. The biopsy of tumors was carried out with needles between 16 and 21 gauge by using a conventional CT. Two to three passes per tumor were obtained.
  
  
  RESULTS
  Biopsy material was sufficient for diagnosis in 48 cases (72%). A renal cell carcinoma was found in 29 (43%) samples of biopsy. The remainder included 13 metastases or lymphomas (18%). A benign lesion was found in 6 cases (9%). 59 patients had a final diagnosis. Accuracy of the biopsy for histopathologic evaluation was 81%. The average lesion size of failed biopsies was 1.5 centimeters. Morbidity occurred in 13% of cases, without immediate life threatening consequence.
  
  
  CONCLUSIONS
  CT-guided renal biopsy is an effective means of obtaining tissue for the diagnosis of focal renal masses. The indications are renal lesions locally advanced, multimetastatic patients, mass in patients with a single kidney and focal lesions in patients with prior history of malignancy.
authors.affiliation: Service de radiologie, Institut Gustave Roussy, 39 rue Camille Desmoulins, 94805 Villejuif Cedex, France. mignon@igr.fr
authors.forename: F
authors.initials: F
authors.lastname: Mignon
authors.forename: B
authors.initials: B
authors.lastname: Mesurolle
authors.forename: M
authors.initials: M
authors.lastname: Ariche-Cohen
authors.forename: D
authors.initials: D
authors.lastname: Vanel
mesh_terms: D001707:Biopsy, Needle / Q000379:methods*; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed
vernacular_title: Intérêt des ponctions biopsies rénales sous contrôle tomodensitometrique: analyse rétrospective de 67 cas.