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Atrophic dermatofibrosarcoma protuberans with the fusion gene COL1A1-PDGFB detected by RT-PCR using only a single
1Department of Dermatology, Beijing Hospital of Traditional Chinese Medicine, Capital Medical University Beijing 100010, China ; Department of Dermatology, Beijing Electric Power Hospital Beijing 100073, China.
Abstract:
Dermatofibrosarcoma protuberans (DFSPs) is an uncommon dermal tumor of intermediate to low-grade malignancy. A few patients have clinically persistent plaques that might be atrophic, and they are difficult to be diagnosed clinically. With the development of cytogenetic and molecular biology techniques, the detection of fusion transcripts of the collagen type 1a1 (COL1A1) and platelet-derived growth factor-BB (PDGFB) genes has been recognized as a reliable and valuable molecular tool for the diagnosis of DFSPs. We reported a 24-year-old woman who had a 2 years history of atrophic DFSPs, and detected the gene fusion between COL1A1 to PDGFB by one-step method of RT-PCR using only a single primer pair. The gene fusion detected by this rapid and efficient one-step method in our patient appears to be the first report of atrophic DFSPs, and we detected a novel COL1A1 breakpoint between exon 2 and exon 3.
Insights
Dermatofibrosarcoma protuberans (DFSPs) are rare skin tumors. A new study identifies a COL1A1-PDGFB gene fusion in an atrophic DFSP case, offering a diagnostic tool.
Area of Science:
- Oncology
- Dermatology
- Molecular Diagnostics
Background:
- Dermatofibrosarcoma protuberans (DFSPs) are uncommon, low-grade malignant dermal tumors.
- Atrophic DFSPs present diagnostic challenges due to subtle clinical features.
Observation:
- A 24-year-old woman presented with a 2-year history of atrophic DFSPs.
- The study utilized a rapid, one-step RT-PCR method to detect gene fusions.
Findings:
- A collagen type 1a1 (COL1A1) to platelet-derived growth factor-BB (PDGFB) gene fusion was identified.
- This represents the first reported instance of this gene fusion in atrophic DFSPs.
- A novel COL1A1 breakpoint between exon 2 and exon 3 was discovered.
Implications:
- The COL1A1-PDGFB fusion serves as a valuable molecular diagnostic marker for DFSPs.
- This rapid detection method can aid in the timely diagnosis of challenging DFSP cases.
- The identification of a novel breakpoint advances understanding of DFSP molecular pathology.
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