Miosis differential diagnosis
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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 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
- Opioids 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 gases; 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 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.