Question:

Asthma, smoking and illicit drug use are the commonly recognised predisposing factors for spontaneous pneumomediastinum (SPM). The most common precipitating event for SPM is?
1. No precipitating event
2. Emesis
3. Physical activity
4. Child birth
5. Exacerbation of asthma





Answer:

The correct answer for the question "Asthma, smoking and illicit drug use are the commonly recognised predisposing factors for spontaneous pneumomediastinum (SPM). The most common precipitating event for SPM is?" is:

1. No precipitating event



Explanation
Most commonly there is no precipitating event preceding SPM. Iyer et al16 and Macia et al2 found as such in >50% cases. This is one of a number of reasons why diagnosis requires a high level of suspicion.



From the manuscript:
Spontaneous Pneumomediastinum Associated with Sex
Radiology Case. 2010 Apr; 4(4):25-29


This article belongs to the Chest section.




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From the manuscript

Spontaneous Pneumomediastinum Associated with Sex

Free full text article: Spontaneous Pneumomediastinum Associated with Sex

Abstract
We present a case of spontaneous pneumomediastinum (SPM) associated with sex. A 22-year-old lesbian with a history of asthma, cigarette and illicit drug smoking was diagnosed with a SPM after developing chest pain and dyspnoea in the context of performing oral sex. The main finding was subcutaneous emphysema involving the neck. SPM is an important differential diagnosis for chest pain in young people. It is a benign condition and diagnosis mainly limited to chest X-ray with increased incidence in asthmatics, smokers and drug addicts.






References



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