Miosis differential diagnosis: Difference between revisions

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==Overview==
==Differential diagnosis of causes of miosis==
=== Age ===
 
The likelihood of suffering miosis increases with age.
 
=== Diseases ===
* [[Horner syndrome]] (a set of abnormalities in the nervous supply of the face due to damage to the [[sympathetic nervous system]]).
* [[Pancoast tumor]] (a [[lung cancer|tumor]] of the apical [[lung]]), due to damage to the ascending sympathetic tract that would normally cause the pupil to dilate.
* [[Hemorrhage]] into [[pons]] ([[intracranial hemorrhage]])
 
=== Drugs ===
* [[Opioid]]s such as [[tramadol]], [[codeine]], [[morphine]], [[heroin]] and [[methadone]]
* [[Antipsychotics]], including [[haloperidol]], [[thorazine]], [[olanzapine]], [[quetiapine]] and others
* [[Cholinergic]] agents such as those used to treat [[Alzheimer's disease]] and [[nerve gas]]es; cholinergic drugs such as [[carbachol]] (Miostat) and [[neostigmine]]
* Some cancer [[chemotherapy]] drugs, including [[camptothecin]] derivatives
* [[Mirtazapine]], a [[noradrenergic and specific serotonergic antidepressant]] ([[NaSSA]])
* [[Trazodone]]
* Some [[MAO_inhibitor|MAO Inhibitors]].
* In some rare cases, when exposed to [[mustard gas]].
 
===Miotics===
A '''miotic''' substance causes the constriction of the [[pupil]] of the eye (or [[miosis]]). It is the opposite of a [[Mydriatic]] substance, which causes [[dilation]] of the pupil.
==References==
==References==
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[[Category:Needs content]]
[[Category:Signs and symptoms]]
[[Category:Physical examination]]
[[Category:Ophthalmology]]
[[Category:Neurology]]
[[Category:Emergency medicine]]

Revision as of 20:38, 20 February 2013