Evaluation of Normal Size and Normogram of Testicular Volume in Iranian Boys Under 15 Years Old Tehran, Iran

Background: Knowing the normal size of children's testis can identify abnormal cases and related pathologies. Objectives: In this study, normal size and normogram of testicular volume in children patients were investigated. Methods: This study was a cross-sectional study which the sampling method was census. Eight hundred and twenty-five boys aged 0 to 15 years in 15 groups of 55 people were included in the study. Ultrasound and the formula of (length × width × height of a fixed number 0.71) was used to calculate the volume of the testis. After data collection, it was entered into SPSS-Ver.20 and data analysis was performed using statistical tests. Results: The mean volume of the left testicle was 2.14 ± 2.02 cc, the mean volume of the right testicle was 1.93 ± 1.74 cc and the mean total volume of both testes was 3.42 ± 6.01 cc. There was a statistically significant difference between the mean Body Mass Index (BMI), height and weight between the groups (P < 0.05). Also, according to the results, a statistically significant difference was found between the mean volume of right testicle, left testicular volume and total testicular volume (TTV) in the studied groups. There was a statistically significant difference between the mean TTV in terms of BMI, height and weight; So that with the increase of the mentioned variables, the total volume of the testis in the patients increased. Conclusions: It can be concluded that three criteria of weight, BMI and height, affect the testicular volume in boys 0 - 15 years. In addition, it is recommended that testicular volume be monitored annually for children.