title: [Cystine lithiasis: retrospective study about 25 cases].
abstract: BACKGROUND
  cystinuria is a severe form of renal which is exposed the patient at multiple recurrent.
  
  
  OBJECTIVE
  Report and identify the clinical and biochemical characteristic of cystinuria in Tunisian region.
  
  
  METHODS
  It is a study of 25 cases of cystinuria, concerning at 16 adults and 9 children from 1995 to 2006. Cystinuria is recognized on the basis of spectrophotometric analysis of the stones (24/1586), by study of urinary crystals completed with brands test (5 cases) or by the two types of explorations.
  
  
  RESULTS
  the frequence of cystinuria is 1.5% (25/1586). 89% stones were renal and 23% were bilateral. The stones have a diameter between 15/30 mm and classified type V at morphology.
  
  
  CONCLUSIONS
  Our data will improve the management based on early diagnosis, regular follow up and respect of dietetic rules.
authors.affiliation: Service de Biochimie, Hôpital Charles Nicolle, Tunis.
authors.forename: R
authors.initials: R
authors.lastname: Belhadj
authors.forename: O
authors.initials: O
authors.lastname: Marrakchi
authors.forename: L
authors.initials: L
authors.lastname: Zerelli
authors.forename: A
authors.initials: A
authors.lastname: Mohsni
authors.forename: Mohamed
authors.initials: M
authors.lastname: Chebil
authors.forename: Jouda
authors.initials: J
authors.lastname: Abdelmoula
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003553:Cystine / Q000032:analysis*; D003555:Cystinuria / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012189:Retrospective Studies; D013055:Spectrophotometry, Infrared / Q000379:methods; D014416:Tunisia / Q000453:epidemiology; D014545:Urinary Calculi / Q000737:chemistry* / Q000175:diagnosis* / Q000453:epidemiology / Q000628:therapy
chemical_list: D003553:Cystine