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Related Experiment Videos

True hermaphroditism associated with microphthalmia.

T Hayashi1, Y Kageyama, K Ishizaka

  • 1Department of Urology, Faculty of Medicine, Tokyo Medical and Dental University, Japan.

European Journal of Endocrinology
|February 26, 1999
PubMed
Summary
This summary is machine-generated.

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This study reports a rare case of a 46,XX individual with undescended testes and hypospadias. Findings suggest the short arm of the X chromosome plays a role in gonad development.

Area of Science:

  • Genetics
  • Developmental Biology
  • Pediatric Endocrinology

Background:

  • A 4-year-old patient presented with congenital anomalies including undescended left testis, penoscrotal hypospadias, and bilateral microphthalmia.
  • Karyotype analysis revealed 46,XX with a deletion on the short arm of the X chromosome (del(x)(p22.31)) and a negative sex-determining region Y (SRY) gene.

Observation:

  • Physical examination revealed a right scrotal testis and a left cystic ovary-like gonad, salpinx, and unicornuate uterus in the inguinal canal.
  • Histological examination of the left gonad confirmed it to be an ovotestis, characterized by primordial follicles surrounding infantile seminiferous tubules.

Findings:

  • The patient's karyotype (46,XX del(x)(p22.31)) and phenotypic presentation suggest a role for the X chromosome's short arm in human gonad differentiation.

Related Experiment Videos

  • The histological structure of the ovotestis, with closely located follicles and infantile seminiferous tubules, indicates that fetal meiosis induction is regulated by local microenvironmental factors rather than systemic hormonal conditions.

    • Implications:

    • This case highlights the critical role of specific X chromosome regions in sexual development and differentiation.
    • Understanding the local microenvironment's influence on meiosis is crucial for comprehending normal fetal gonad development and potential disruptions in disorders of sex development.