title: Evaluation of preoperative testicular volume in Japanese children with unilateral cryptorchidism.
abstract: OBJECTIVE
  We measured the testis volume of patients with unilateral cryptorchidism preoperatively and compared with a unilateral hydrocele testis to assess testicular development in these patients.
  
  
  METHODS
  The present study included 129 children (ranging in age from 10 months to 5 years) with unilateral cryptorchidism who were treated from 2000 to 2006 at our institution. We evaluated the correlation between testicular volume and the location of testes or the age of these children. We also examined the testicular volume of 50 children with unilateral hydrocele testis (range, 8 months to 5 years).
  
  
  RESULTS
  There was no difference in testicular volume among each position of the undescended testis. The volumes of both undescended testes and hydrocele testes did not change until 5 years of age. There was a significant difference in testicular volume between undescended and hydrocele testes. The average testicular volume of cryptorchidism is significantly smaller than that of hydrocele testes both under and over 2 years old.
  
  
  CONCLUSIONS
  From the viewpoint of undescended testicular volume, cryptorchid children should be operated on as early as possible.
authors.affiliation: Department of Nephro-urology, Nagoya City University Graduate School of Medical Science, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Kamisawa
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Kojima
authors.forename: Yutaro
authors.initials: Y
authors.lastname: Hayashi
authors.forename: Makoto
authors.initials: M
authors.lastname: Imura
authors.forename: Kentaro
authors.initials: K
authors.lastname: Mizuno
authors.forename: Kenjiro
authors.initials: K
authors.lastname: Kohri
mesh_terms: D000704:Analysis of Variance; D002675:Child, Preschool; D003456:Cryptorchidism / Q000453:epidemiology / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007223:Infant; D007564:Japan / Q000453:epidemiology; D008297:Male; D006848:Testicular Hydrocele / Q000453:epidemiology / Q000473:pathology* / Q000601:surgery