Silicosis and Primary Carcinoma of the Bronchos

Our plain-English summary of Silicosis and Primary Carcinoma of the Bronchos, by M.J. Fine, J.V. Jaso.

The study

• Authors: M.J. Fine, J.V. Jaso
• Published: JAMA - Journal of the American Medical Association
• 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 was a case report from Newark City Hospital, New Jersey. It concerned silicosis, a lung disease caused by inhaling stone dust, and a cancer of the bronchus, not asbestos. A married white man was referred to the chest clinic with a diagnosis of advanced pulmonary tuberculosis. He was first seen in May 1933, had lost 13 pounds in the past year, and was a pipe smoker. His sputum was examined repeatedly, but tubercle bacilli (the tuberculosis germ) were not found. Silicosis was diagnosed from the history and physical examination. The patient was admitted to the hospital and died in March. At autopsy, the upper lobe of the right lung was almost entirely fibrotic (scarred), and the right lung showed a primary carcinoma of the bronchus. The authors said they had examined twenty-one cases of silicosis, and this was the one without tuberculosis in which a malignant tumor had developed. The authors gave their opinion that the combination of the two diseases is not uncommon, and that it seems rare because too few cases of silicosis come to autopsy.

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: case report
• Who was studied: One married white man referred to the chest clinic of Newark City Hospital, Newark, N.J., with a diagnosis of advanced pulmonary tuberculosis. He was first seen in May 1933. His age is unreadable in the scan.
• Exposure: Stone dust (silica), as the cause of silicosis. The scan is too damaged to state the patient's job or the length of his dust exposure with certainty. A garbled phrase may refer to work as a cutter for twenty years. He smoked a pipe, 'but not to excess'.
• Main results:
  • The patient had lost 13 pounds during the past year.
  • His sputum was examined repeatedly, and tubercle bacilli were never found.
  • Silicosis was diagnosed from the history and physical examination. The case was complicated by an overlooked and unsuspected primary carcinoma of the bronchus.
  • The patient died in March.
  • At autopsy, the upper lobe of the right lung was almost entirely fibrotic.
  • The right lung showed primary carcinoma of the bronchus.
  • The authors had examined twenty-one cases of silicosis, and most of those patients died of complicating tuberculosis. This was the one case without tuberculosis in which a malignant tumor had developed.
• The authors' conclusion: The authors stated, as their opinion, that the combination of silicosis and primary carcinoma of the bronchus is not uncommon, and that its apparent rarity is due to too few cases of silicosis coming to necropsy (autopsy). They also wrote that a careful history would have suggested silicosis rather than tuberculosis, and that workers exposed to the dust hazard should have chest X-rays at the start of work and at intervals afterwards.

Topics

Medical terms in this study, explained in our Lexicon: Silicosis, Carcinoma, Bronchus, Sputum, Autopsy.

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