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Related Concept Videos

Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
The Y Chromosome Determines Maleness02:19

The Y Chromosome Determines Maleness

The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...
Mutations01:39

Mutations

Overview
Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Sex-linked Disorders01:43

Sex-linked Disorders

Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
Infertility in Males01:23

Infertility in Males

Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...

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Combined Supine and Standing Imaging for Varicocele: An Improved Diagnostic Approach
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Genetic alterations associated with cryptorchidism.

Alberto Ferlin1, Daniela Zuccarello, Biagio Zuccarello

  • 1Section of Clinical Pathology and Centre for Male Gamete Cryopreservation, Department of Histology, Microbiology and Medical Biotechnologies, University of Padova, Via Gabelli 63, 35121 Padova, Italy.

JAMA
|November 20, 2008
PubMed
Summary
This summary is machine-generated.

Genetic alterations are linked to persistent and bilateral cryptorchidism in male infants. This study found a higher frequency of genetic changes, including Klinefelter syndrome, in affected boys.

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Area of Science:

  • Pediatric Endocrinology
  • Medical Genetics
  • Developmental Biology

Background:

  • Cryptorchidism is a common congenital defect in males, increasing risks for infertility and testicular cancer.
  • Hormonal pathways involving insulin-like factor 3 (INSL3) and testosterone are critical for testicular descent.
  • Disruptions in these hormonal pathways may contribute to the development of cryptorchidism.

Purpose of the Study:

  • To investigate the frequency of genetic alterations in male infants diagnosed with cryptorchidism.
  • To identify specific genetic anomalies associated with different forms of cryptorchidism.

Main Methods:

  • A case-control study was conducted in two Italian pediatric surgery departments from 2003 to 2005.
  • Six hundred male infants with cryptorchidism and 300 non-cryptorchid controls were analyzed.
  • Genetic analysis included karyotype anomalies and mutations in INSL3, INSL3 receptor, and androgen receptor genes.

Main Results:

  • The overall frequency of genetic alterations in cryptorchidism was 2.8%, significantly higher than in controls (0.3%).
  • Persistent and bilateral cryptorchidism showed a higher prevalence of genetic alterations (5.3% and 8.3%, respectively).
  • Klinefelter syndrome (8 cases) and INSL3 receptor gene mutations (5 cases) were the most frequent findings.

Conclusions:

  • A statistically significant association exists between bilateral/persistent cryptorchidism and specific genetic alterations.
  • Klinefelter syndrome and INSL3 receptor gene mutations are key genetic findings in a subset of cryptorchidism cases.
  • Genetic factors play a role in the etiology of cryptorchidism, particularly in more severe presentations.