Conclusion:
The relation between Khat chewing and vocal tract tissue reaction
leading to oropharyngeal fibrosis and deformities could be proposed with
strong relation to the use of pesticides. Further studies are needed to
confirm the relation between different types of pesticides and Khat
chewing. Wide sample of control group in areas north to Sanaa’ and areas
in Sanaa’ or to the west with analysis of the type of Khat in each area
and with oro-pharyngo-laryngeal examination of these cases. Strong
recommendations to stop using Khat irrigated with Pesticides or at least
to wash it carefully to wash out the pesticide remnants. Questions
regarding Khat chewing should be involved in clinical history taking
especially in immigrants coming from countries famous of using Khat.
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