Abstract: With the method of ESR saturation power point we have detected the hair of 573 cases of healthy, pulmonary cancer, oesophageal cancer, as well as silicosis, pulmonary tuberculosis related with pulmonary cancer, and cardiovascular disease, mean while compared with their clinical diagnosis. The results show that the positive rate is 1.69%, 85.42%, 90.48%, 20.0%, 27.27% and 0% respectively. There is an obvious distinction between pulmonary cancer, oesophageal cancer and healthy person (P<0.001). ESR saturation power point elevates sharply after treatment of pulmonary cancer, 71.43% are between 7.9 to 24.0 (mW), after treatment of oesophageal cancer, 71.23% are between 7.9 to 19.9 (mW). All patients with cardiovascular disease were examined to be negative, i. e above 10.0 (mW).

Key words: Electron spin resonance (ESR), Saturation power point (mW), Pulmonary cancer, Oesophageal cancer, Tuberculosis, Silicosis, Cardiovascular disease