News | Computed Tomography (CT) | November 28, 2023

Combined marijuana and cigarette smokers were also three to four times more likely to have airway wall thickening, which can indicate damage to the airways

Combined marijuana and cigarette smokers were also three to four times more likely to have airway wall thickening, which can indicate damage to the airways

November 28, 2023 — Smoking marijuana in combination with cigarettes may lead to increased damage of the lung’s air sacs, according to research being presented today at the annual meeting of the Radiological Society of North America (RSNA).  

Jessie Kang, M.D.

Jessie Kang, M.D.

It is commonly believed that smoking marijuana is not harmful to the lungs. There is an abundance of established research that identifies the harms of cigarette smoking. In contrast, very little is known about the effects of marijuana smoking, and even less research has been done on the combined effects of smoking marijuana and cigarettes.

“Marijuana is the most widely used illicit psychoactive substance in the world, and its use has increased in Canada since the legalization of non-medical marijuana in 2018,” said study co-author Jessie Kang, M.D., cardiothoracic radiologist and assistant professor in the Department of Diagnostic Radiology at Dalhousie University in Halifax, Nova Scotia, Canada. “Currently, not much research exists on the effects of marijuana smoking on the lungs.”

To determine the effects of marijuana and cigarette smoking, researchers for the multicenter prospective study examined the chest CT images of four patient groups: non-smokers, cigarette smokers, marijuana smokers, and combined marijuana and cigarette smokers. Marijuana smokers included in the study had smoked marijuana at least four times a month for two years. Patients who ingested marijuana via edibles or oral drops were excluded from the study.

The researchers found that people who combined marijuana and cigarettes were 12 times more likely to have centrilobular emphysema than non-smokers. Centrilobular emphysema is a type of pulmonary emphysema where the air sacs within the lungs are damaged. This can lead to breathing difficulties and other serious respiratory symptoms.

“The mean number of marijuana smoking years was less than compared to cigarette smokers and combined marijuana and cigarette smokers,” Dr. Kang said. “However, marijuana that is smoked is often unfiltered, which can potentially lead to more damaging particles entering the airways and lungs.”

Combined marijuana and cigarette smokers were three to four times more likely to have airway wall thickening, which can lead to infections, scarring and further airway damage. Association with marijuana only and smoking only with bronchial wall thickening was not as significant. Similar results were seen with centrilobular and paraseptal emphysema, suggesting that the combination of cigarette and marijuana smoking may have a synergistic role on the lungs and airways.

“With our study, we show that there are physical effects of marijuana smoking on the lungs and that cigarette smoking and marijuana smoking may have a combined damaging effect on the lungs,” Dr. Kang said.

According to Dr. Kang, further research is needed to identify the long-term effects of smoking marijuana.

“There is a common public misconception that marijuana smoking is not harmful,” Dr. Kang said. “More research needs to be done in this area, so the public can make an informed decision on their recreational usage of marijuana.”

Co-authors are Sebastian Karpinski, B.Sc., Paul Sathiadoss, M.B.B.S., Eric Lam, M.Sc., Eric Hutfluss, M.D., O. Osorio, M.D., D. A. Hashem, M.D., Matthew D. F. McInnes, M.D., and Giselle Y. Revah, M.D.

For more information: www.rsna.org

Find more RSNA23 conference coverage here


Related Content

News | Artificial Intelligence

March 1, 2024 — Royal Philips, a global leader in health technology, and magnetic resonance imaging (MRI) software ...

Time March 01, 2024
arrow
News | FDA

March 1, 2024 — Varian, a Siemens Healthineers company, announced that it has received 510(k) clearance from the U.S ...

Time March 01, 2024
arrow
News | Artificial Intelligence

February 29, 2024 — AIxSCAN, Inc., a Sunnyvale, CA-based developer of a next generation artificial intelligence (AI) ...

Time February 29, 2024
arrow
News | Cardiac Imaging

February 28, 2024 — Royal Philips, a global leader in health technology, announced major enhancements to its Image ...

Time February 28, 2024
arrow
News | Magnetic Resonance Imaging (MRI)

February 28, 2024 — Royal Philips, a global leader in health technology, today announced a significant milestone as it ...

Time February 28, 2024
arrow
News | Artificial Intelligence

February 27, 2024 — Median Technologies announced that the Company will be participating and speaking at the premier ...

Time February 27, 2024
arrow
News | Artificial Intelligence

February 27, 2024 — As artificial intelligence (AI) is increasingly used in radiology, researchers caution that it’s ...

Time February 27, 2024
arrow
News | X-Ray

February 26, 2024 — AIxSCAN, Inc. began clinical trials in late 2023. The AIxSCAN, Inc. team is very pleased with the ...

Time February 26, 2024
arrow
News | Artificial Intelligence

February 26, 2024 — DeepHealth, Inc., one of the leading providers in healthcare radiology informatics, has today ...

Time February 26, 2024
arrow
News | Magnetic Resonance Imaging (MRI)

February 21, 2024 — Hyperfine, Inc., a groundbreaking health technology company that has redefined brain imaging with ...

Time February 21, 2024
arrow
Subscribe Now