[Combined mass X-ray examinations of the respiratory tract (author's transl)]

2908 persons were investigated by mass chest x-ray combined with mass x-ray of the paranasal sinuses to find respiratory tract diseases. In 412 persons a sinusitis was diagnosed. 212 persons had a positive history, that is headache, cough and/or bronchial secretions, the other 200 persons had a negative history. 91 persons with a negative history and 21 persons with apositive history showed spontaneous remissions. The results of the bacteriological tests and antibiogramms corresponded with the preceding reports. In the investigated population groups a high percentage of new undetected cases of sinusitis was found one year after their previous treatment needing a new treatment. The frequency of undetected sinusitis in adults is often underestimated. Mass chest x-ray examinations should be combined with x-ray examinations of the paranasal sinuses.