Dacryops of the Third Eyelid in a cat

Abstract

A 9-month-old female Domestic Short-haired cat was presented with a mass of three-month duration at the base of the third eyelid of the right eye (OD). Fine-needle aspiration was carried out at another clinic, revealing clear fluid. The mass soon reformed, and the cat was referred. Ophthalmic examination revealed a pale-pink, smooth, oval mass under the conjunctiva on the anterior aspect of the third eyelid. Surgical removal of the mass was performed. Histopathology revealed a large dilated cyst together with a number of small cysts lined by simple cuboidal, and low squamous epithelium with some secretory cells. Dacryops of the third eyelid lacrimal gland was diagnosed. The eye healed uneventfully after surgery, and no recurrence was seen during one year of follow-up.

Dacryops with extensive lacrimal and maxillary bone defects in four dogs

“…Dacryops in companion animals have been reported in the conjunctiva and in the ventromedial site of the orbit in dogs 12,20 and at the third eyelid of cats 21 . In humans, and in the ventromedial site of the orbit in dogs 12,20,21 dacryops is an uncommon benign cystic lacrimal gland tissue neoplasm. The exact etiology of dacryops remains unknown 22 .…”

Bilateral temporal dacryops in a cat

“…[16][17][18] However, only one case of a unilateral cyst of lacrimal origin (dacryops) has been so far reported in cats, associated with the third eyelid. 10 Our case report describes the clinical signs, histopathological findings, and surgical treatment in a case of bilateral dacryops of the temporal lacrimal glands in a young cat.…”

“…More recently, a case of a lacrimal cyst has also been reported in a cat, although it was presumed to originate from the third eyelid gland. 10 In both cases, a possible infectious etiology from FHV-1 had been suggested, given the presence of fibrosis and symblepharon over the affected eye, 10,25 and a recent history of chronic corneal and conjunctival inflammation, although PCR testing for FHV-1 was negative. 25 The cat in the present report had no previous history of any ocular disorders, except for the progressive enlargement of the bilateral cysts in the few weeks prior to presentation.…”

“…They have been most commonly described in association with scleral staphylomas, 1 primary or secondary neoplasia, 2,3 foreign body granuloma, 4 nodular episclerokeratitis, 5 orbital fat prolapse, 6 congenital dermoid, 7 larval migration, 8 parasitic infection, 9 and cystic dilation of lacrimal tissue. 10 In veterinary literature, cysts associated with lacrimal tissues have been sporadically reported in dogs. In this species, lacrimal cysts may originate from both the main orbital and nictitans lacrimal glands, [11][12][13] be associated with dilation of the nasolacrimal excretory system, 14,15 or originate from choristomatous lacrimal tissue.…”

“…Differential diagnosis for the bilateral cystic swellings included scleral staphyloma, 1 primary or secondary neoplasia, 2,3 foreign body granuloma, 4 nodular episclerokeratitis, 5 orbital fat prolapse, 6 congenital dermoid, 7 larval migration, 8 and cystic dilation of lacrimal tissue. 10 Ultrasound biomicroscopy (LIGHTSonic B/UBM, Light-Med, Inc) and B-scan ultrasonography (EPIQ 5G, Philips Ultrasound, Inc) of both eyes were performed. Both modalities revealed the presence of a cavitated tubular structure, filled with fluid, moderately echogenic content ( Figure 2); both structures originated from the dorsolateral scleral quadrant and extended posteriorly into the orbit, approximately 7 mm in diameter and 25 mm long OD and slightly smaller, but comparable, OS.…”