Limbal pseudotumor in a Cob Pony.

This research article discusses the diagnosis, surgical removal, and subsequent analysis of an inflammatory tissue mass in the eye of a 12-year-old Cob Pony mare. The surgery was successful and there were no complications or recurrence at 6- and 12-month follow-ups.

Diagnosis of Limbal Pseudotumor

• The study discusses a case where a Cob Pony mare of 12 years had developed a tissue mass in the right eye. This mass was spotted at the lateral-limbal site, a part of the eye where the cornea meets the sclera.
• The formation was likened to a tumor due to its abnormal size and position but is referred to as a pseudotumor, indicating it was not a true cancerous growth.

Surgical Removal of the Pseudotumor

• The tissue mass was not only covering the lateral limbus but had also extended to the bulbar conjunctiva (the outer surface of the eye) and part of the cornea (the transparent front surface of the eye).
• The surgical procedure to remove this mass was successful. The corneal defect, which was created post removing the mass, was repaired using a pedicle bulbar conjunctival graft. This type of graft involves transplanting a part of the bulbar conjunctiva from elsewhere in the eye to cover the defect.

Post-surgical Analysis and Follow-up

• The removed tissue was examined and found to be inflammatory in nature, containing mononuclear cells. Mononuclear cells are a type of immune cell, and their presence suggests an immune response to an irritant or infection rather than a malignant or neoplastic (tumor) process.
• Follow-up examinations were conducted at 6 and 12 months after the surgery. During these examinations, there was no signs of recurrence of the pseudotumor or any surgical complications, which suggests the procedure was a success and the cause of the original inflammation was successfully removed.