The clinical observations on the bronchogenic cancer of one hundred sixty cases treated in the Department of Thoracic Surgery, Seoul National University Hospital are as follows:
1) Most of them, 90 percent of the cases were over 40 years of age and male was predominated over female with sex ratio of 6 to 1.
2) The average duration of symptoms before the first examination was about 5 months and the most common complaints were cough, chest pain, breathing difficulty and blood-tinged sputum.
3) In ninety-four cases(59%) thoracotomy was undertaken with resection of the lesion in 52 cases(33% ).
4) Histopathological diagnoses made in 141 cases were squamous cell carcinoma in 47.5%, undifferentiated cell carcinoma in 33.3%, adenocarcinoma in 9.2% and alveolar cell carcinoma in a single case.
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