Estágio inguinoescrotal da migração testicular: análise em 217 fetos humanos

Abstract

Studying the path of the testis in the fetal period can be an important tool for understanding cryptorchidism, as this is one of the main causes of testicular cancer and infertility in adulthood. Also considered the congenital alteration in male individuals more frequent in outpatient care. Evaluate the passage of testes through the inguinal canal in human fetuses. Analyzes the position of 434 testes in 217 human fetuses aged 10 to 35 weeks post-conception (WPC). Measure the following parameters: age (WPC), weight (g), total length (TL) (cm), vertex-coccyx length (CRL) (cm) e feet length (mm). For these measures, used a digital caliper, measuring tape and digital scale. The fetuses had weight ranging from 14g to 2860g and TL ranging from 8cm to 48cm. This study classified the testicular position as: abdominal, inguinal and scrotal. Categorized as abdominal all testes observed in the abdominal cavity up to the inner ring; as inguinal, all the testes observed between the inner ring and the outer ring; as scrotal, all testes found just below the outer ring up to the scrotum. The analysis of linear regression (RL) by the Pearson method showed that there is a significant correlation when comparing the age of the fetus with its weight, TL and CRL, both in the total period analyzed (between 10th and 35th WPC) and in the period where testes were found in the inguinal canal (between 17th and 29th WPC). Observed that all testes were classified as abdominal until the 16th WPC and that after the 30th WPC all were classified as scrotal. All testicles classified as inguinal (48 testicles), were observed in 29 fetuses that represented only 13.36% of the sample, showing that the inguinoscrotal stage of testicular descent is a fast process and that it occurred more intensely between the 20th and the 26th WPC.