Mixed Tobacco and Marijuana Smoking Linked to Rare Lung Condition | Research

The takeaway

A 48-year-old man with a history of both tobacco and cannabis smoking developed vanishing lung syndrome, a rare form of severe emphysema typically affecting the upper lungs.

Pulmonologists, primary care physicians, respiratory health researchers

Combined tobacco and cannabis use may have additive effects on lung tissue damage

What the researchers found

This case report describes a patient with long-term dual tobacco and cannabis use who developed idiopathic giant bullous emphysema (vanishing lung syndrome), supporting the hypothesis that combined use may have an additive damaging effect on lung tissue.

Why it matters

While smoking-related lung damage is well documented for tobacco alone, this case adds to evidence that combining cannabis and tobacco may carry additional respiratory risks beyond either substance individually.

The numbers in context

48-year-old male patient; long-term history of both tobacco and cannabis smoking; giant emphysematous bullae located primarily in upper lung lobes.

How the study worked

Single case report with review of recent literature on the association between vanishing lung syndrome and combined marijuana and tobacco use.

What this study cannot tell us

Single case report cannot establish causation; the patient's tobacco use alone may have been sufficient to cause VLS; no controlled comparison.

How to read the evidence

Single case report with literature review provides preliminary evidence only.

When this study was published

Published in 2021.

The bigger picture

As dual use of tobacco and cannabis remains common, cases like this raise questions about whether current respiratory risk assessments adequately account for the combined effects of both substances.

Questions still open

Does combined tobacco and cannabis use accelerate emphysema progression compared to tobacco alone? Is the mechanism additive or synergistic?

Common questions

What is vanishing lung syndrome?

Vanishing lung syndrome is a rare form of chronic obstructive pulmonary disease characterized by giant emphysematous bullae, primarily in the upper lungs, leading to severe progressive shortness of breath and significant disability.

Can marijuana smoking alone cause this condition?

The case report describes a patient who used both tobacco and cannabis, and the authors suggest an additive effect. Whether cannabis alone can cause VLS remains unclear, though it has been noted in prior literature as a risk factor.

Read the original research

Vanishing lung syndrome: a consequence of mixed tobacco and marijuana use.

BMJ case reports, 14(5)

View on PubMed ↗Publisher’s paper ↗

Citation

Salley, Jordan R; Kukkar, Vishal; Felde, Lanna. (2021). Vanishing lung syndrome: a consequence of mixed tobacco and marijuana use.. BMJ case reports, 14(5). https://doi.org/10.1136/bcr-2020-239255