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Clonal chromosomal abnormalities in desmoid tumors. Implications for histopathogenesis
J A Bridge1, C Sreekantaiah, B Mouron
1University of Kansas Medical Center, Kansas City.
Cancer
|January 15, 1992
Summary
Cytogenetic analysis reveals that desmoid tumors (aggressive fibromatosis) exhibit clonal abnormalities, suggesting a neoplastic origin. Specific chromosomal changes, including Y chromosome and 5q alterations, may play a role in desmoid tumor development.
Area of Science:
- Oncology
- Genetics
- Pathology
Background:
- Desmoid tumors, also known as aggressive fibromatosis, have an unclear histopathogenesis.
- Understanding the genetic underpinnings of desmoid tumors is crucial for diagnosis and treatment.
Purpose of the Study:
- To investigate the cytogenetic abnormalities in desmoid tumors.
- To determine if specific chromosomal alterations are associated with desmoid tumors, particularly in patients with Gardner's syndrome (GS).
Main Methods:
- Cytogenetic analysis was performed on 26 desmoid tumor specimens from 22 patients.
- Karyotypic analysis was used to identify chromosomal abnormalities, including clonal and random changes, and telomeric fusion.
Main Results:
- Clonal karyotypic abnormalities were detected in 7 cases, random abnormalities in 14, and telomeric fusion in 5.
- Loss of chromosome Y was observed as a clonal aberration in two patients.
- 5q involvement was noted in six patients, with clonal interstitial deletions of 5q in three, irrespective of GS status.
Conclusions:
- The findings support a clonal and neoplastic origin for desmoid tumors.
- Abnormalities of the Y chromosome and 5q are suggested to be significant in the genesis of desmoid tumors.