Dacryops of the Third Eyelid in a cat

Dacryops with dacryolithiasis in a dog

Background

Objectives

Methods

Results

Conclusion

Dacryops with extensive lacrimal and maxillary bone defects in four dogs

OBJECTIVE

To describe and discuss ventromedial orbital lacrimal gland or duct cysts (dacryops) in dogs with extensive bone defects based on their symptoms, results of diagnostic imaging and histopathological examination, and therapy and discuss their potential origin based on the morphology.

ANIMALS STUDIED

Four dogs of different breeds, age, and sex were presented with a unilateral round, slow growing, indolent, and non-tender process ventromedial to the nasal canthus of the eye.

PROCEDURES

Transverse computed tomography showed a low-density, non-contrast-enhancing cystic process ventromedial to the globe with extensive defects in the lacrimal and maxillary bones in all cases. The cystic character of the structure was confirmed by the aspiration of the brownish fluid without cellular and microbiological contents. For treatment, the cystic fluid was aspirated, and the sclerosing agent polidocanol was injected in three cases. Cystorhinostomy (nasal marsupialisation) was performed in one case as the first choice and in another case following failure of sclerotherapy. Histopathological examination of the cyst walls was performed in two cases and confirmed the diagnosis of dacryops.

RESULTS

Follow-up between 2 and 18 months showed no recurrence and very good to excellent cosmetic results.

CONCLUSIONS

Aberrant lacrimal gland or duct tissue with secondary development of dacryops should be included in the differential diagnoses of ventromedial orbital cysts. Large cysts near the lacrimal drainage system with extensive bone defects in dogs should be treated by nasal marsupialization. Treatments such as evacuation of the cyst and inducing sclerosis (sclerotherapy) should be reserved for exceptional cases.

Bilateral temporal dacryops in a cat

A 1-year-old Maine Coon female spayed cat was presented for a 7-week history of bilateral pinkish masses located over the dorsotemporal conjunctival quadrants. Ophthalmic examination revealed the presence of bilateral temporal, slightly hyperemic, subconjunctival masses, fluctuant, and nonpainful. The remainder of the ocular examination was unremarkable. Ultrasound biomicroscopy and B-scan ultrasonography confirmed the presence of a bilateral cavitated and tubular structure, extending within the temporal orbit, with anechoic fluid-like content. Surgical removal was performed. Histopathology described the lesions as lacrimal gland tissue, markedly infiltrated by inflammatory cells, associated with cavitated structures filled with proteinaceous debris, and lined by flattened bilayered cuboidal epithelial cells. Bilateral adenitis of unknown origin and dacryops of the temporal lacrimal glands were diagnosed. Both surgical sites healed uneventfully, and no recurrence was reported on either eye during a 12-month follow-up period.