title: What is the relationship between spermatozoa per milliliter at adulthood and the tubular fertility index at surgical age for patients with cryptorchidism?
abstract: OBJECTIVE
  The aim of this study was to find out the relationship in the patient with cryptorchidism between the number of spermatogonia at surgical age and spermiogram data at adulthood.
  
  
  METHODS
  Between 1971 and 1996 the authors surgically treated 1,550 children for 2,249 undescended testis. In 21 unilateral and 41 bilateral cryptorchidism patients, both testis were biopsied at surgical procedure during childhood. We currently have spermiogram data for a patient at adulthood.
  
  
  RESULTS
  By using the best Tubular Fertility Index (TFI) figures of both testis, the Sperman correlation index between the two parameters is r = 0.22, statistically nonsignificant. The TFI test sensitivity is 0.68 and the specificity is 0.60. The likehood ratio for a positive test result is 0.84 and the likehood ratio for a negative test result is 0.37.
  
  
  CONCLUSIONS
  Although the authors have only one spermiogram, and there are few cases, they suspect the TFI is not a good index to predict the potential fertility in cryptorchidism patients.
authors.affiliation: Department of Paediatric Surgery, Miguel Servet Children's Hospital, Zaragoza, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Gracia
authors.forename: J
authors.initials: J
authors.lastname: Sánchez
authors.forename: C
authors.initials: C
authors.lastname: García
authors.forename: C
authors.initials: C
authors.lastname: Pueyo
authors.forename: A
authors.initials: A
authors.lastname: Ferrández
mesh_terms: D000328:Adult; D002648:Child; D003456:Cryptorchidism / Q000150:complications / Q000503:physiopathology* / Q000601:surgery*; D005298:Fertility / Q000502:physiology*; D006801:Humans; D007248:Infertility, Male / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D008297:Male; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D013076:Sperm Count