Over a five-year span 1,134 patients with asymptomatic solitary pulmonary nodules were entered into a cooperative study. Of the 392 lesions found to be primary bronchogenic carcinoma, 67 patients were living and under observation ten years following operation. In the study, 32% of lesions were primary bronchogenic carcinoma, the incidence being 51% in patients above the age of 50 years. "Curative" resection was possible in 309 patients (78.9%) with a five-year observed survival of 38.5% and a ten-year observed survival of 20.1%. Factors that influenced long-term survival were size of lesion, age at operation, and interval between the last normal and the first abnormal x-ray film. Histologic cell type and extent of resection were not found to influence long-term survival.
Higgins GA, Shields TW, Keehn RJ. The Solitary Pulmonary Nodule: Ten-Year Follow-Up of Veterans Administration-Armed Forces Cooperative Study. Arch Surg. 1975;110(5):570–575. doi:10.1001/archsurg.1975.01360110116019
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