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Acral myxoinflammatory fibroblastic sarcoma with unique clonal chromosomal changes
I Lambert1, M Debiec-Rychter, P Guelinckx
1Department of Pathology, University of Leuven, University Hospital St. Rafael, Belgium.
Virchows Archiv : an International Journal of Pathology
|June 16, 2001
Summary
Acral myxoinflammatory fibroblastic sarcoma, a rare extremity tumor, shows unique chromosomal abnormalities including a t(1;10) translocation. These genetic changes confirm its status as a distinct neoplastic entity.
Area of Science:
- Oncology
- Cytogenetics
- Surgical Pathology
Background:
- Acral myxoinflammatory fibroblastic sarcoma (AMFS) is a rare tumor affecting the distal extremities.
- The cytogenetic profile of AMFS has not been previously reported.
Observation:
- A case of AMFS presented as a foot mass in a 53-year-old woman.
- Histological examination revealed characteristic virocyte-like and lipoblast-like cells within a myxoid and inflammatory stroma.
Findings:
- Cytogenetic analysis identified a complex karyotype with a reciprocal translocation t(1;10)(p22;q24) and loss of chromosomes 3 and 13.
- Fluorescence in situ hybridization (FISH) localized the translocation breakpoints near the BCL10 and GOT1 genes on chromosomes 1p22 and 10q24, respectively.
Implications:
- The identified clonal chromosomal abnormalities support the classification of AMFS as a distinct tumor entity.
- These findings contribute to the understanding of the molecular pathogenesis of soft tissue sarcomas.
- Karyotypic analysis can aid in the diagnosis and classification of rare sarcomas.