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By John A. Nakhosteen M.D., Werner Maassen M.D. (auth.), John A. Nakhosteen M.D., Werner Maassen M.D. (eds.)

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Additional resources for Bronchology: Research, Diagnostic, and Therapeutic Aspects: Proceedings of the Second World Congress for Bronchology, held at Düsseldorf, FRG, 2–4 June 1980

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Improvement of results after re-checking by experienced cytologists and after second examination of step section~: Positive findings could be increased cytologically by 12i~ and histologically by 8~;. 8% TA8LE 8. 9~~ and 72%, the rate of accuracy for cytology is approximately 20% higher than that for histology. AUTHOR Friedel, 1964 Kirsch a. 2J~ + Total number of peripheral tumours ++ Peripheral tumours which could not be seen bronchoscopical. TABLE 9. 06%, the false positive rate by cytology is lower than that by histology.

In addition, there are significant occu- pational and envirormental risk factors, but these are minor canpared to cigarette sroking. It is unfortunate that efforts to reduce SllDking have been only partially successful. Symptarratic lung cancer is usually advanced and incurable. There are only two reliable tests for detecting presymptomatic, localized disease, that is American Joint Ccmn:i ttee WC) post-surgical stage I cancer. These tests are chest radiography, which is the rrost sensitive for identifying peripheral turcors, and sputum cytology, which is best for detecting central "hilar-type" squarrous cancers that are radiographically occult.

In the following report, we contrast the cytological diagnoses of catheter biopsies with those of bronchial secretion samples and compare these with previously published histological findings. 2. MATERIALS AND METHODS Between 1971 and 1977, 1594 catheter biopsies and bronchial secretion samples were taken simultaneously from patients at the lung clinic of the Dieckholzen Hospital. Malignant tumours diagnosed morphologically and clinically for 437 of these cases, 223 of which were confirmed by histology.

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