It refers to outward displacement of eye ball along the margine of the orbit. It is very synonimous to "exophthalmos" but it is related to Thyroid diseases where "proptosis " doesnot.
Classsification: 1.Unilateral proptosis
2.Bilateral proptosis
3.Acute proptosis
4.Intermittent proptosis &
5.Pulsating proptosis
Aetiology: Orbital cyst, foriegn body invagination, blow out fracture, cavernous thrombophlebitis, encephaly(cranio dysostosis), orbital teratoma,orbital varix,vascular compressions,Etc
Investigation: All hematological tests, CT scan, Computerised Sonography, Plain X-ray, Radiotherapy,Etc
Surgery: Fine Needle Aspiration, Incision And Excision.
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