Faecal Occult Blood Test

Case of the Month (Emma Scurrell April 2010)

Scleral rupture

 Clinical history

A 5-year old, male cat was involved in a road traffic accident (RTA) and suffered proptosis of the right globe, which was subsequently repositioned. One month later the eye was enucleated due to persistent uveitis, secondary glaucoma and blindness.

Gross Findings

The main lesion (see figure below) is a focal rupture of the posterior sclera. Note the adherent extraocular fat and muscle at the rupture site (arrow). The lens is displaced posteriorly.  The retina is detached and coats the posterior lens surface admixed with haemorrhage



Final Diagnosis

Traumatic scleral rupture

Discussion

Scleral rupture occurs most commonly as a result of blunt trauma, for which RTAs are the leading cause in cats. Because the majority of ruptures are located within the posterior sclera, they are often not identified on initial clinical examination but can usually be confirmed using ultrasound.

The acute decompressive forces associated with blunt trauma to the globe which result in scleral rupture are often accompanied by significant injury to the internal ocular structures subsequently resulting in permanent blindness. Associated dislocation of the lens secondary to severe trauma is not uncommon such as in this case and in some cases, the lens can rupture or actually be extruded through the scleral wound.

If enucleation is not performed, eventual shrinkage of the globe will occur resulting in phthisis bulbi.


Previous Monthly Cases

Hypertensive Retinopathy January 2010
FIP in a cat - uncommon presentation February 2010
Phaeohyphomycosis    March 2010



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Faecal Occult Blood Test