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[Molecular pathological diagnosis of soft tissue tumors]
1Department of Surgical Pathology, Sapporo Medical University School of Medicine, Sapporo 060-8543, Japan. hasetada@sapmed.ac.jp
Abstract:
Among soft tissue tumors, which have some difficulties in diagnosis and treatment, it is known that distinctive chromosomal and gene abnormalities such as chromosomal translocations and fusion genes resulting from these translocations can be detected. We have focused on the research and development of split-signal DNA probes for FISH analysis, which can establish an accurate diagnosis by detecting the specific fusion genes for soft tissue tumors. Using these probes as well as commercially available probes, we conduct the FISH analysis on formalin-fixed, paraffin-embedded histological specimens to apply these methods to the routine pathological diagnosis. In this article, we introduce (1) principle of detecting fusion genes by RT-PCR and FISH, (2) outlines of FISH using split-signal probes, and (3) results of FISH analysis in Ewing sarcoma/PNET, rhabdomyosarcoma, pleomorphic liposarcoma and extraskeletal myxoid chondrosarcoma.
Insights
Accurate diagnosis of soft tissue tumors is improved by detecting specific fusion genes using split-signal DNA probes for fluorescence in situ hybridization (FISH) analysis. This method aids routine pathological diagnosis of challenging tumor types.
Area of Science:
- Oncology
- Genetics
- Pathology
Context:
- Soft tissue tumors present diagnostic and therapeutic challenges.
- Specific chromosomal abnormalities, including translocations and fusion genes, are characteristic of these tumors.
- Accurate detection of these genetic alterations is crucial for diagnosis.
Purpose:
- To develop and apply split-signal DNA probes for fluorescence in situ hybridization (FISH) analysis.
- To detect specific fusion genes in soft tissue tumors for accurate diagnosis.
- To integrate FISH analysis into routine pathological diagnosis.
Summary:
- This study focuses on developing split-signal DNA probes for FISH analysis to detect fusion genes in soft tissue tumors.
- FISH analysis is performed on formalin-fixed, paraffin-embedded histological specimens.
- The article details the principles of detecting fusion genes via RT-PCR and FISH, outlines FISH procedures with split-signal probes, and presents results for Ewing sarcoma/PNET, rhabdomyosarcoma, pleomorphic liposarcoma, and extraskeletal myxoid chondrosarcoma.
Impact:
- Enables more accurate and reliable pathological diagnosis of soft tissue tumors.
- Facilitates the identification of specific genetic markers for targeted therapies.
- Contributes to improved patient management and treatment strategies for soft tissue malignancies.
