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Gonadoblastoma: clinicopathologic correlation in six patients
American Journal of Obstetrics and Gynecology
|November 1, 1976
Summary
This study presents six cases of gonadoblastomas, often associated with dysgerminoma and Y chromosome markers. Findings highlight the importance of Y chromosome analysis in diagnosing these rare gonadal tumors.
Area of Science:
- Gynecology
- Oncology
- Genetics
Background:
- Gonadoblastomas are rare germ cell tumors, frequently associated with gonadal dysgenesis and the presence of a Y chromosome.
- Dysgerminomas, a type of malignant germ cell tumor, can exhibit significant overgrowth and may coexist with gonadoblastomas.
- Clinical presentation of gonadoblastomas varies, including virilization, amenorrhea, and pelvic masses, necessitating thorough diagnostic evaluation.
Purpose of the Study:
- To present a series of six patients diagnosed with gonadoblastomas.
- To analyze the clinical, pathological, and genetic features of these gonadoblastomas, including associated dysgerminomas and Y chromosome presence.
- To evaluate the diagnostic utility of imaging (abdominal films) and cytogenetic studies (Y chromosome, Y chromatin) in these cases.
Main Methods:
- Review of six patients with gonadoblastomas.
- Analysis of clinical data, including reasons for investigation (amenorrhea, pelvic masses, virilization).
- Chromosomal analysis of peripheral leukocyte cultures and Y chromatin studies on gonadal tissue.
- Radiographic assessment using abdominal films for calcification detection.
Main Results:
- Six patients presented with nine gonadoblastomas; three (possibly four) had significant dysgerminomatous overgrowth.
- Calcification was detected preoperatively in three cases via abdominal films.
- All patients, except one with a 46 XX/45 XO karyotype, showed a Y chromosome stem line.
- The patient with the 46 XX/45 XO karyotype had Y chromatin bodies in her gonadoblastoma, found in a normal ovary.
Conclusions:
- Gonadoblastomas can present with significant dysgerminomatous components and may occur in patients with varied karyotypes, including mosaicism.
- Y chromosome detection, through karyotyping and Y chromatin analysis, is crucial for the diagnosis and understanding of gonadoblastomas.
- Radiological detection of calcification can aid in preoperative diagnosis of gonadoblastomas.