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Dicentric Y chromosome and mixed dysgenesis
P F Weckworth1, H W Johnson, J T Pantzar
1Department of Surgery (Urology), University of British Columbia, Vancouver, Canada.
The Journal of Urology
|January 1, 1988
Summary
This study details four cases of mixed gonadal dysgenesis involving a dicentric Y chromosome. Early gonadectomy and female gender assignment are recommended for these patients.
Area of Science:
- Genetics
- Endocrinology
- Pediatric Surgery
Background:
- Mixed gonadal dysgenesis (MGD) is a disorder of sexual development.
- The presence of a Y chromosome, even in mosaic form, can lead to complex phenotypes.
Observation:
- Four cases of MGD with a mosaic karyotype (45X and 46X, dic(Y)) were analyzed.
- Clinical presentations varied, including ambiguous genitalia, Turner's syndrome features, and male pseudohermaphroditism (hypospadias, cryptorchidism).
Findings:
- A dicentric Y chromosome in MGD presents a spectrum of gonadal and genital abnormalities.
- Mosaicism involving 45X and 46X, dic(Y) cell lines is characteristic.
Implications:
- Early consideration of female gender assignment and gonadectomy is crucial for patients with a dicentric Y chromosome.
- This approach aims to mitigate risks associated with dysgenetic gonads and optimize patient outcomes.