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Cytogenetic findings in two synovial sarcomas
J Limon1, K Mrózek, B Nedoszytko
1Department of Biology and Genetics, Medical Academy, Gdańsk, Poland.
Cancer Genetics and Cytogenetics
|April 1, 1989
Summary
Cytogenetic analysis of synovial sarcomas revealed specific chromosomal translocations. These findings, particularly involving chromosome 18, may help in diagnosing this rare cancer.
Area of Science:
- Oncology
- Cytogenetics
- Cancer Biology
Background:
- Synovial sarcoma is a rare soft tissue sarcoma.
- Accurate diagnosis relies on morphology, immunohistochemistry, and increasingly, cytogenetic analysis.
- Recurrent tumors present diagnostic challenges.
Observation:
- Two recurrent synovial sarcomas underwent short-term tissue culture and cytogenetic analysis.
- A poorly differentiated tumor showed a karyotype of 49,XY, +7, +8, +19,t(5:18)(q11.2;q11.2).
- A biphasic tumor exhibited two clonal cell lines with translocations t(X;18)(p11.2;q11.2) and t(12;17)(p11.2;q11.2).
Findings:
- The predominant cell line in the biphasic tumor had additional aberrations: t(1;12)(q21;q24.3), t(3;18)(p23;q21), and 17p+.
- The common translocation t(X;18)(p11.2;q11.2) was observed in both tumors.
- Translocations involving chromosome 18 with other chromosomes appear to be a consistent feature in synovial sarcoma.
Implications:
- Cytogenetic findings can aid in the differential diagnosis of synovial sarcoma.
- Identification of recurrent chromosomal abnormalities may lead to targeted therapies.
- Further research into the role of chromosome 18 translocations is warranted for understanding synovial sarcoma pathogenesis.