*Pneumothorax*

to reduce the chance of recurrence although we should not neglect the deleterious role of marijuana and cannabis smoking as a risk of PSP. From the author's point of view, cannabis has a more destructive effect on the lung parenchyma exposing patients to a higher risk of first-attack and recurrent pneumothorax. This has also been noted elsewhere [34]. Smoking cessation advice is therefore given to all our patients who smoke after the first episode of spontaneous pneumothorax.
