Comparison of testicular volume differential calculations in adolescents with varicoceles

J Pediatr Urol. 2014 Apr;10(2):396-8. doi: 10.1016/j.jpurol.2013.12.007. Epub 2014 Jan 11.

Abstract

Purpose: We aimed to develop a conversion formula between different calculations for testicular volume asymmetry.

Materials and methods: Male adolescents with varicoceles who underwent scrotal ultrasound were studied. Two formulas were analyzed: (1) testicular volume differential, TVDiff = (RTV - LTV)/(TTV), and (2) atrophy index, AI = (RTV - LTV)/(RTV). RTV, LTV, and TTV represent the right, left, and total testicular volume. Through transformations and regression a conversion formula between the calculations was derived.

Results: Based on 248 ultrasounds, a clear relationship between the two formulas was demonstrated: AI = ln[(1.97 × TVDiff) + 1], (p < 0.0001).

Conclusions: Differential testicular volumes can easily be converted from one formula to another with near-perfect accuracy. The formulas are essentially identical and interchangeable.

Keywords: Adolescents; Scrotal ultrasound; Testicular volume differential; Varicocele.

Publication types

  • Comparative Study

MeSH terms

  • Adolescent
  • Cohort Studies
  • Humans
  • Male
  • Organ Size
  • Retrospective Studies
  • Scrotum / diagnostic imaging
  • Scrotum / growth & development*
  • Sensitivity and Specificity
  • Severity of Illness Index
  • Testis / diagnostic imaging
  • Testis / growth & development*
  • Ultrasonography, Doppler / methods
  • Varicocele / diagnostic imaging*
  • Varicocele / physiopathology