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KIT and platelet-derived growth factor receptor α gene expression in laryngeal small cell carcinoma
T Kanazawa1, M Nokubi, K Takizawa
1Department of Otolaryngology, Jichi Medical University Saitama Medical Center, Saitama City, Saitama, Japan. kanatake@omiya.jichi.ac.jp
Objective:
Small cell carcinoma has the worst prognosis of all laryngeal neoplasms. In order to further characterise this tumour, with a view to development of new therapeutic approaches, we report the results of KIT gene and platelet-derived growth factor receptor α gene expression analysis, for two extremely rare cases of primary small cell carcinoma of the larynx.
Method:
Case reports, including immunohistochemical study, and review of the literature.
Results:
We present two patients with laryngeal small cell carcinoma, who died from tumour metastasis to the lungs and brain despite aggressive treatment. Immunohistochemical studies revealed positive reactions for KIT gene expression and platelet-derived growth factor α gene expression in patient one, and for KIT gene expression in patient two. Molecular genetic analysis, using polymerase chain reaction direct sequencing, identified no mutations of the KIT or platelet-derived growth factor receptor α genes.
Conclusion:
Although further investigation is necessary regarding KIT gene expression and platelet-derived growth factor receptor α gene expression in laryngeal small cell carcinoma, the reported results suggest that these genes may be significant in the development of molecular targeted therapy.
Insights
Investigating KIT and platelet-derived growth factor receptor α genes in rare laryngeal small cell carcinoma cases revealed their potential role. These findings suggest possible new molecular targeted therapies for this aggressive cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Small cell carcinoma of the larynx is a rare and aggressive neoplasm with a poor prognosis.
- Understanding the molecular drivers of this cancer is crucial for developing effective treatments.
Observation:
- This study analyzed KIT gene and platelet-derived growth factor receptor α (PDGFRA) gene expression in two rare cases of primary laryngeal small cell carcinoma.
- Immunohistochemical studies showed positive KIT expression in both patients and positive PDGFRA expression in one patient.
- No mutations were identified in the KIT or PDGFRA genes via polymerase chain reaction direct sequencing.
Findings:
- KIT gene expression was observed in both patients with laryngeal small cell carcinoma.
- Platelet-derived growth factor receptor α gene expression was also detected in one of the patients.
- Despite aggressive treatment, both patients succumbed to metastatic disease, highlighting the aggressive nature of this cancer.
Implications:
- The expression of KIT and PDGFRA genes in laryngeal small cell carcinoma warrants further investigation.
- These genes may represent potential targets for novel molecular targeted therapies against this challenging cancer.
- Further research could pave the way for new therapeutic strategies to improve outcomes for patients with laryngeal small cell carcinoma.
