sɪsBased on the Random House Dictionary, © Random House, Inc. 2013.
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proptosis (prɒpˈtəʊsɪs) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n , pl -ses | |
| pathol See also exophthalmos Compare prolapse the forward displacement of an organ or part, such as the eyeball | |
| [C17: via Late Latin from Greek, from propiptein to fall forwards] | |
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| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
proptosis prop·to·sis (prŏp-tō'sĭs)
n. pl. prop·to·ses (-sēz)
Forward displacement of an organ, especially an eyeball.
prop·tot·ic (-tŏt'ĭk) adj.
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proptosis
abnormal protrusion of one or both eyeballs. The most common cause for unilateral or bilateral exophthalmos is thyroid eye disease, or Graves ophthalmopathy. The proptosis arises from inflammation, cellular proliferation, and accumulation of fluid in the tissues that surround the eyeball in its socket, or orbit. The vast majority of people with Graves ophthalmopathy also have (or will later develop) thyroid dysfunction. Other causes of exophthalmos include other orbital inflammatory conditions, spread of infection from the paranasal sinuses or teeth, trauma, various orbital tumours, and vascular (blood vessel) abnormalities of the orbit. It should also be noted that "prominent" eyes can be a normal inherited trait in certain families
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