OBJECTIVES: To determine the accuracy of orchidometry and ultrasonography for measuring the testicular volume by comparing the resultant measurements with the actual testicular volume in humans. METHODS: The testicular volume of 40 testes from 20 patients with prostate cancer (mean age +/- SD 74.5 +/- 7.5 years) was measured using the Prader orchidometer and ultrasonography before therapeutic bilateral orchiectomy. The ultrasound measurements of testicular volume were calculated using three formulas: length (L) x width (W) x height (H) x 0.52, L x W2 x 0.52, and L x W x H x 0.71. The actual testicular volumes were determined by water displacement of the surgical specimen. RESULTS: The mean actual testicular volume of the 40 testes was 9.3 cm3 (range 2.5 to 23.0). A strong correlation was found between the testicular volume calculated by the three ultrasound formulas and the actual volume (r = 0.910 to 0.965, P <0.0001) and was stronger than the correlation with the Prader orchidometer (r = 0.818, P <0.0001). The smallest mean difference from the actual testicular volume was observed with the formula L x W x H x 0.71, which overestimated the actual volume by 0.80 cm3 (7.42%). The measurements using the Prader orchidometer correlated with the actual testicular volume and with the testicular volume calculated using the three ultrasound formulas (r = 0.801 to 0.816, P <0.0001). However, the orchidometer measurements had the largest mean difference from the actual testicular volume (6.68 cm3, 81.7%). CONCLUSIONS: The results of this study have shown that measuring the testicular volume by ultrasonography is more accurate than by the Prader orchidometer, and the formula L x W x H x 0.71 was the most accurate for calculating the testicular volume.
OBJECTIVES: To determine the accuracy of orchidometry and ultrasonography for measuring the testicular volume by comparing the resultant measurements with the actual testicular volume in humans. METHODS: The testicular volume of 40 testes from 20 patients with prostate cancer (mean age +/- SD 74.5 +/- 7.5 years) was measured using the Prader orchidometer and ultrasonography before therapeutic bilateral orchiectomy. The ultrasound measurements of testicular volume were calculated using three formulas: length (L) x width (W) x height (H) x 0.52, L x W2 x 0.52, and L x W x H x 0.71. The actual testicular volumes were determined by water displacement of the surgical specimen. RESULTS: The mean actual testicular volume of the 40 testes was 9.3 cm3 (range 2.5 to 23.0). A strong correlation was found between the testicular volume calculated by the three ultrasound formulas and the actual volume (r = 0.910 to 0.965, P <0.0001) and was stronger than the correlation with the Prader orchidometer (r = 0.818, P <0.0001). The smallest mean difference from the actual testicular volume was observed with the formula L x W x H x 0.71, which overestimated the actual volume by 0.80 cm3 (7.42%). The measurements using the Prader orchidometer correlated with the actual testicular volume and with the testicular volume calculated using the three ultrasound formulas (r = 0.801 to 0.816, P <0.0001). However, the orchidometer measurements had the largest mean difference from the actual testicular volume (6.68 cm3, 81.7%). CONCLUSIONS: The results of this study have shown that measuring the testicular volume by ultrasonography is more accurate than by the Prader orchidometer, and the formula L x W x H x 0.71 was the most accurate for calculating the testicular volume.
Authors: Simon Freeman; Michele Bertolotto; Jonathan Richenberg; Jane Belfield; Vikram Dogra; Dean Y Huang; Francesco Lotti; Karolina Markiet; Olivera Nikolic; Subramaniyan Ramanathan; Parvati Ramchandani; Laurence Rocher; Mustafa Secil; Paul S Sidhu; Katarzyna Skrobisz; Michal Studniarek; Athina Tsili; Ahmet Tuncay Turgut; Pietro Pavlica; Lorenzo E Derchi Journal: Eur Radiol Date: 2019-07-22 Impact factor: 5.315
Authors: Angela Delaney; Rita Volochayev; Brooke Meader; Janice Lee; Konstantinia Almpani; Germaine Y Noukelak; Jennifer Henkind; Laura Chalmers; Jennifer R Law; Kathleen A Williamson; Christina M Jacobsen; Tatiana Pineda Buitrago; Orlando Perez; Chie-Hee Cho; Angela Kaindl; Anita Rauch; Katharina Steindl; Jose Elias Garcia; Bianca E Russell; Rameshwar Prasad; Uttam K Mondal; Hallvard M Reigstad; Scott Clements; Susan Kim; Kaoru Inoue; Gazal Arora; Kathryn B Salnikov; Nicole P DiOrio; Rolando Prada; Yline Capri; Kosuke Morioka; Michiyo Mizota; Roseli M Zechi-Ceide; Nancy M Kokitsu-Nakata; Cristiano Tonello; Siulan Vendramini-Pittoli; Gisele da Silva Dalben; Ravikumar Balasubramanian; Andrew A Dwyer; Stephanie B Seminara; William F Crowley; Lacey Plummer; Janet E Hall; John M Graham; Angela E Lin; Natalie D Shaw Journal: J Clin Endocrinol Metab Date: 2020-05-01 Impact factor: 5.958