| Objective The size of prostate is an important indicator for measuring male sexual development and its development may impact the sexual function and fertility. During the growth period of children, due to differences between individuals, which may lead to differences among children in the same age group. Therefore, when judging the development of prostate whether it is normal, firstly, we shall give out the normal reference value in this age bracket. However, data related to those measurements in China are fewer. This study worked out prostate’s three diameters and physiological values of volume via measuring three groups of data including prostate’s anteroposterior diameter, superainferior diameter and left-right diameter in each age group; analyzed the correlations among height, weight, age, size of testicle and each index of prostate; summarized the development law of prostate for children in different age; and provided the references for observation of male children’s sexual development and diagnosis of children’s prostate diseases.Methods Retrospective analysis was carried out in children who had the physical examinations in 2013.6-2014.3 in our hospital. The prostate data were collected in 450 patients at age of 1~15 years old who performed the ultrasonic measurements. Prostate’s anteroposterior diameter, superainferior diameter and left-right diameter as well as the physiological values of volume were statistically gathered in each age group. Meanwhile, the size of testicle was measured to analyze the relationships between development of testicle and the prostate; compare the differences of testicle development among different age groups; and analyze the relationships between the prostate and height, weight, age, BMI, volume of testicle.Results A total of 450 patients were measured with a mean age of 8.04 years old ranged from 1 and 15 years old. The results were as follows: The physiological values of prostate in 1~years old were 0.87±0.29ml;The 2~years old were 1.18±0.39ml;The 3~years old were 1.15±0.51ml;The 4~years old were 1.57±0.69ml;The 5~years old were 1.34±0.65ml;The 6~years old were 1.42±0.56ml;The 7~years old were 1.51±0.49ml;The 8~years old were 1.89±0.99ml;The 9~years old were 2.08±0.85ml;The 10~years old were 2.13±0.92ml;The 11~ ears old were 2.11±0.79ml; The 12~years old were 3.52±1.47 ml;The 13~years old were 4.54±2.50ml;The 14~years old were 6.70±2.64ml; The 15 years old were 7.66±2.06ml。Double ANOVA was adopted for the analysis of prostate volumes in 15 groups above between 1~10 years old. The difference among groups was no significant(P>0.05). Comparison of prostate volumes among 11 and 15 years old, it showed the significant difference(P<0.05). It indicated that those children at 1-10 years old whose prostate had almost not developed were in a slow growth period. Their prostate blood flow signals even could not display in each anatomic area of prostate. The development of prostate entered into a fast growth period in 11 ~ 15 years old group. The later group had significant difference(P<0.01) compared with the former group. But the central anatomic area of prostate and the blood flow signals of prostate were displayed little.Conclusions:⑴The prostate volumes of children in Han group were 0.87cm3 at 1 years old,were 1.15cm3 at 3 years old, 1.42 cm3 at 6 years old,2.08 cm3 at 9 years old, 3.52 cm3 at 12 years old and 7.66 cm3 at 15 years old in Chenzhou area.⑵The development of prostate in normal children is in a slow growth period between 1~11 years old and will enter into a fast growth period since 12 years old.⑶Prostate’s three diameters have significantly positive correlation developed and grown at the same time. ⑷Children’s testicle development is about one year earlier than the prostate development, presenting the positive correlation. ⑸ The development of prostate in normal children has a positive correlation with age and positive correlation with the height and weight. |
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