Histopathological Aspects of Occult Cancer of the Lung

Our plain-English summary of Histopathological Aspects of Occult Cancer of the Lung, by O. Auerbach, A.P. Stout (1964).

The study

• Authors: O. Auerbach, A.P. Stout
• Published: Annals of the New York Academy of Sciences, Volume 114 (1964)
• Type of article: Journal article
• Our copy: from Johns-Manville's own medical library. The article is still under copyright, so we describe it here rather than post it.

In plain English

This short article by Auerbach and Stout described microscopic changes in the lining of the windpipe and airways (the tracheobronchial tree) that the authors linked to cigarette smoking and lung cancer. It does not mention asbestos. The readable text does not say how many people were studied or how tissue was obtained. The authors reported that the first changes appeared in the basal cell layer. They wrote that abnormal-looking cell nuclei were rare in nonsmokers and occasional smokers and became more common as smoking increased. Lesions they considered precancerous were not seen in nonsmokers and occasional smokers and were few in light smokers. They appeared in 11.4 per cent of slides from people who smoked two or more packs of cigarettes and 15 per cent of slides from people who died of lung cancer. In all 23 sites showing early invasion of cancer, the invasion occurred at such precancerous foci. The authors concluded that these lesions could justifiably be regarded as preinvasive carcinoma. They held that only a lesion whose surface was entirely replaced by cells comparable to invasive cancer cells should be considered occult cancer.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: Histopathology report describing microscopic findings in the tracheobronchial tree, drawing on the authors' own studies; the readable text does not describe the methods
• Who was studied: Microscope slides of tracheobronchial trees from nonsmokers, occasional, light and heavy cigarette smokers, and people who died of lung cancer; numbers of people, place and period not given in the readable text
• Exposure: Cigarette smoking (inhaled cigarette smoke), graded by amount smoked; no asbestos exposure is discussed
• Main results:
  • The first changes produced by inhaled carcinogens occurred in the basal cell layer
  • Abnormal (atypical) cell nuclei were rare in the airways of nonsmokers and occasional smokers and increased progressively with the amount smoked
  • Lesions the authors considered precancerous were absent in nonsmokers and occasional smokers and few in light smokers
  • Precancerous lesions were found in 11.4 per cent of slides from people who smoked two or more packs of cigarettes and 15 per cent of slides from people who died of lung cancer
  • In 23 sites with early invasion of cancer, the invasion occurred at the site of such precancerous foci in every instance
• The authors' conclusion: The authors concluded that these precancerous lesions could justifiably be considered truly preinvasive carcinoma. They held that only a lesion whose normal surface is entirely replaced by anaplastic cells comparable to invasive carcinoma cells counts as occult cancer.

Topics

Medical terms in this study, explained in our Lexicon: Lung Cancer, Carcinoma.

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