Chest computed tomographic patterns on cannabis-only smokers.

Congress:

ECR 2020

Poster Number:

C-15296

Type:

Educational Exhibit

Keywords:

Chest, Lung, Respiratory system, CT, CT-High Resolution, Diagnostic procedure, Biological effects, Tissue characterisation, Prospective, Diagnostic or prognostic study, Multicentre study

Authors:

P. De Souza¹, P. Postigo¹, D. Alves¹, I. Souza¹, P. Barros¹, A. Souza ¹, S. Rêgo², C. A. P. Fontes³, A. S. A. D. Melo¹; ¹Niteroi/BR, ²Rio de Janeiro/BR, ³Niterói, RJ/BR

DOI:

10.26044/ecr2020/C-15296

DOI-Link:

https://dx.doi.org/10.26044/ecr2020/C-15296

Fig. 5: Mosaic attenuation pattern both in inspiration (A) and expiration (B).

Fig. 6: Numerous small paraseptal emphysema in right lung apex and a greater one in...

Fig. 7: Numerous large blisters in both lungs in different cuts.

Fig. 8: A hypertensive pneumothorax with a unidirectional valve mechanism indicated by...

Learning objectives

To describe CT lung parenchyma imaging findings that might be caused cannabis-only smoking habit; To correlateit with usage time; To propose a natural history of cannabis smoking.

Background

Over 160 million people use marijuana worldwide. Although the health impacts of smoking tobacco are well known, those related to smoking cannabis are still poorly understood. When comparing both cigarette and marijuana smoke, there is little difference except for the presence of nicotine in the former and cannabinoids in the latter. However, the dynamics of smoking are different.One who smokes marijuana brings about 66% more smoke, with a 33% greater inspiration depth and 400% more inspiratory pause than a who smokes tobacco. Combining smoking dynamics...

Findings and procedure details

Initially, a total of 99 reviews or case reports that had the term “computed tomography” along with the term “cannabis” or “marijuana” weresurveyed in the PubMed database. All studies not related to lung analysis (83) or in non-English language (5) were excluded, leaving a total of 11. We chose not to use the important review study by Lee & Hancox (2011) because reported results for chest computed tomography lack discernment of cannabis load in many cases. All 14 cases found, presented in table 1, were...

Conclusion

Even with a monthly cannabis use similar to patients with abnormalities found, young patients who have not had long exposure time do not seem to have alterations in parenchyma. The usage-time component seems to have more relevance at the onset of alveolar destruction than the joints-per-day component of cannabis load analysis. Our study points out that younger subjects with shorter exposure time, regardless of the amount of cannabis exposure, had an initial pattern of air retention or mild paraseptal emphysema, although most had no pulmonary...

Personal information and conflict of interest

C. A. P. Fontes; Niteroi, RJ/BR - nothing to disclose P. Souza; Niterói/BR - nothing to disclose P. Postigo; Niteroi/BR - nothing to disclose P. P. T. R. Barros; Niterói/BR - nothing to disclose A. Souza; Niterói/BR - nothing to disclose D. Alves; Niteroi/BR - nothing to disclose I. Souza; Niterói/BR - nothing to disclose S. Rego; Rio de Janeiro/BR - nothing to disclose A. Alves; Niterói/BR - nothing to disclose

References

1.United Nations Office on Drugs and Crime. World Drug Report 2006. 2.Fraser RG, Pare JAP, Pare PD, Fraser RS, Genereux GP. Diagnosis Of Diseases Of The Chest. 1990;8(3):160-. 3.US Department of Health and Human Services. Chronic obstructive lung disease. The health consequences of smoking. A report of the Surgeon General. DHHS Publication No.84-2677. Washington, DC, 1984. 4.Tashkin DP. Pulmonary complications of smoked substance abuse. West J Med. 1990;152(5):525-30. 5.WU T-C, Tashkin DP, Djahed B, Rose JE. Pulmonary Hazards of Smoking Marijuana as Compared with Tobacco....