title: Individual renal function in polycystic kidney disease: a follow-up study.
abstract: OBJECTIVE
  This study was undertaken to determine individual renal function in patients with autosomal dominant polycystic kidney disease (ADPKD).
  
  
  METHODS
  The authors initially examined (study t1) 25 patients with ADPKD (12 female, 13 male; ages 18 to 68 years). The serum creatinine concentration and glomerular filtration rate, measured by Tc-99m DTPA, were 1.5 +/- 0.56 mg/dl and 65.7 +/- 31 ml.minute-1.1.73 m2, respectively. Thirteen patients had a follow-up study (t2) 2 years after their initial evaluations. Individual renal function was assessed on Tc-99m DMSA renal scans.
  
  
  RESULTS
  The mean (+/- SD) difference between left kidney DMSA (DMSA-L) and right kidney DMSA (DMSA-R) was 7.04 % +/- 16.48%. In 20 patients (80%), the left kidney had a lower percentage contribution to the total renal function compared with the right kidney. When the results of the two studies were compared, deterioration in renal function was noted. In the t1 study, the mean serum creatinine concentration and glomerular filtration rate were 1.7 mg/dl and 67.02 ml.minute-1.1.73 m2 respectively, and in the t2 study these values were 2.01 mg/dl and 57.15 ml.minute-1.1.73 m2, respectively. No difference, however, was found in individual renal function in the two studies.
  
  
  CONCLUSIONS
  In patients with ADPKD, the percentage contribution of each kidney to total renal function is not equal and remains stable during the progression of renal failure.
authors.affiliation: Departments of Nuclear Medicine, Nephrology, and Statistics, University Hospital, University of Ioannina Medical School, Ioannina, Greece.
authors.forename: A D
authors.initials: AD
authors.lastname: Fotopoulos
authors.forename: K
authors.initials: K
authors.lastname: Katopodis
authors.forename: O
authors.initials: O
authors.lastname: Balafa
authors.forename: A
authors.initials: A
authors.lastname: Katsaraki
authors.forename: R
authors.initials: R
authors.lastname: Kalaitzidis
authors.forename: K C
authors.initials: KC
authors.lastname: Siamopoulos
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D005260:Female; D005500:Follow-Up Studies; D005919:Glomerular Filtration Rate; D006801:Humans; D007677:Kidney Function Tests; D008297:Male; D008875:Middle Aged; D016891:Polycystic Kidney, Autosomal Dominant / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D011877:Radionuclide Imaging; D012044:Regression Analysis; D012680:Sensitivity and Specificity; D019783:Technetium Tc 99m Dimercaptosuccinic Acid; D016284:Technetium Tc 99m Pentetate
chemical_list: D019783:Technetium Tc 99m Dimercaptosuccinic Acid; D016284:Technetium Tc 99m Pentetate