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Congenital mesonephric defects in male infants with mucoviscidosis
Abstract:
Reports that men with mucoviscidosis were sterile and that portions of their genital tracts were atretic prompted us to investigate the genital tracts of 15 male infants with mucoviscidosis who died within the first year of life and came to necropsy. The genital tracts of all of these infants were abnormal, the abnormalities being confined to mesonephric derivatives. Hypoplastic or absent ducti efferentia, ducti epididymides, or ducti deferentia were found in all 28 specimens of epididymides, and the ducti deferentia were missing from 25 of 27 examples of spermatic cord. The seminal vesicles and the ejaculatory ducts were less frequently hypoplastic or absent. Because these abnormalities of mesonephric derivatives were present so early in life and inflammatory and obstructive changes were absent we believe that they resulted from a failure of development.
Insights
Male infants with mucoviscidosis (cystic fibrosis) exhibit congenital abnormalities in their genital tracts. These developmental failures in mesonephric derivatives likely explain early-life sterility in affected males.
Area of Science:
- Reproductive Medicine
- Pediatric Pathology
- Genetic Disorders
Background:
- Previous reports indicated sterility and atretic genital tracts in adult men with mucoviscidosis.
- Congenital abnormalities in the male reproductive system are a known complication of certain genetic disorders.
Purpose of the Study:
- To investigate the genital tracts of male infants who died from mucoviscidosis within their first year of life.
- To identify specific abnormalities and their developmental origins in the male reproductive system associated with early-stage mucoviscidosis.
Main Methods:
- Necropsy examination of the genital tracts of 15 male infants diagnosed with mucoviscidosis.
- Detailed analysis of mesonephric derivatives, including ducti efferentia, epididymides, ducti deferentia, seminal vesicles, and ejaculatory ducts.
Main Results:
- All 15 infants displayed abnormal genital tracts, exclusively affecting mesonephric derivatives.
- Hypoplasia or absence of ducti efferentia, ducti epididymides, and ducti deferentia were consistently observed.
- Seminal vesicles and ejaculatory ducts also showed frequent hypoplasia or absence.
Conclusions:
- The observed genital tract abnormalities in male infants with mucoviscidosis are likely due to developmental failure, not inflammation or obstruction.
- These early-life mesonephric derivative abnormalities provide a basis for understanding congenital male infertility in mucoviscidosis.