Detection of early lung cancer: results of radiologic and cytologic screening in the Miyagi program.
Eighty-eight lung cancers including 82 primary and 6 metastatic tumors were detected by chest X-ray examination of a total of 363,320 participants in Miyagi Prefecture in Japan during 3 years period from 1982 to 1984. Sputum cytology was performed in the high-risk group (above 50 years of age with cigarette index above 600) of the total participants during the same period. This detected 67 patients with malignant tumors including 5 with cancer of the upper respiratory tract and 62 with primary lung cancer. Fifty-one of 67 cancers (82.3%) detected by sputum cytology were radiographically occult lung cancers. The annual ratio of the detection of lung cancer was 45/100,000 in the first year, however, it decreased to 38/100,000 in the second year and to 15/100,000 in the third year. Cancer resection was performed in 63.6%, 76.1% and 80.0% of the patients, in the first, the second and the third year, respectively. On the average, 57% of the patients who underwent cancer resection demonstrated early lung cancer. Especially, 45 of 51 patients with lung cancer detected by sputum cytology underwent tumor resection, of which 40 (89%) bore early lung cancer.
Nakada
T
T
Sato
H
H
Saito
Y
Y
Fujimura
S
S
D000230:Adenocarcinoma / Q000517:prevention & control*; D000367:Age Factors; D018288:Carcinoma, Small Cell / Q000517:prevention & control*; D002294:Carcinoma, Squamous Cell / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000517:prevention & control*; D008297:Male; D008400:Mass Chest X-Ray; D008403:Mass Screening / Q000379:methods* / Q000458:organization & administration; D012907:Smoking; D013183:Sputum / Q000166:cytology; D014397:Tuberculosis, Pulmonary / Q000517:prevention & control