Radiological classification and determination of necessity for resection therapy on fotry-five cases of primary lung cancer have been studied during the past three years at the department of thoracic surgery, Pusan National University Hospital:
1) In 53.3% of the cases, various secondary changes were present, which made surgery contraindicated.
2) The following secondary changes were found:
a) Narrowing of the main bronchi in 45% of the cases.
b) Narrowing of the lobar bronchi in 44% of the cases.
3) The expectancy rate of resection was 59% in all but the actual rate of resection was merely 22% of all the cases.
Causes of this fact were: Refusal of operation, metastasis to the thoracic wall and "the frozen hilum" resulting in impossibility of separation.
4) Radiological classification of the lung cancer revealed the following types: field 【mass type; hilar mass type; field infilterative type; lober 【atelectatic type; and hilar infilterative type in order of occuilence.
5) It is concluded that of the methods to determine 【necessity for lung resection, bronchography, histological classification, mediastinal tomography. and detemination of presence or absence of Metastasis to thoracic wall are the most important factors.
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