<i>Coenurus cerebralis</i> cyst in the orbit of a ewe

Abstract

A 4-year-old Rahmani breed ewe was presented for surgery to the Veterinary Teaching Hospital, South Valley University, Egypt with enlargement and protrusion of the eye ball, blepharitis and congestion of the conjunctiva. On examination, a cyst 2.5 cm x 3.5 cm in diameter containing sandy fluid was detected in the perioptic nerve fat. Histopathological examination revealed that the epithelial lining of the conjunctiva was necrotic and severely infiltrated by neutrophils. The underlying connective tissue was oedematous, hyperaemic and severely infiltrated by neutrophils. Desquamation of the corneal epithelium was seen, together with oedema of the stroma. The tissue surrounding the cyst was compressed and the lacrimal glands revealed pressure atrophy. The muscular tissue was atrophied and infiltrated by fat cells. The cyst wall was lined with white scolices protruding from the inner wall. Based on the gross and histopathological characteristics of the cyst observed, the cyst was diagnosed as Coenurus cerebralis. This is the first report of orbital coenurosis in a sheep.

Retro-bulbar cyst of Coenurus gaigeri in Barbari goats

“…Proptosis or exorbitism has also been reported due to enzootic nasal adenocarcinoma (De las Heras et al 2003) and conidiobolomycosis (Silva et al 2007) in sheep. Parasitic cysts in and around the eye balls are rare and have been attributed to hydatidosis in horse (Barnett et al 1988), cysticercosis in pigs (Cardenas-Ramirez et al 1984), Taenia serialis in rabbits (O'Reilly et al 2002;Holmberg et al 2007), Coenurus cerebralis in ewe (Haridy et al 2014) and coenurosis in man (Williams and Templeton 1971;Manschot 1976;Ibechukwu and Onwukeme 1991). In this investigation orbital coenurosis was diagnosed in the goat as the cause of unilateral exopthalamia.…”

“…The reasons of exopthalamia include retro-bulbar abscess, cellulitis, haematoma, glaucoma, tumors and cyst (Wilcock 2007;Haridy et al 2014). Eosinophilic myositis, lacrimal gland affections, foreign body granuloma, trauma can also lead to exopthalamoses (Boydell 1991).…”

Diagnosis and surgical management of a retrobulbar abscess causing unilateral exophthalmos in a Boer goat

“…No globesparing orbital exploratory procedures have been described in ruminants, where exenteration is more commonly used particularly when vision has been lost and restoration of patient comfort is paramount. 3,14,15,29,30 To the authors' knowledge, this is the first documented case report of a mixed bacterial retrobulbar abscess with intraocular extension in a goat, with advanced imaging and subsequent surgical management.…”

“…Multicentric B‐cell lymphoma has been reported in a goat to cause bilateral exophthalmos 13 . Limited reports exist of aberrant migration of Taenia multiceps resulting in retrobulbar cyst formation and exophthalmos in sheep and goats 3,14,15 . More commonly, these parasites are known to cause central nervous system cysts (Coenurus cerebralis) in sheep, goats, cattle, and humans.…”

“…13 Limited reports exist of aberrant migration of Taenia multiceps resulting in retrobulbar cyst formation and exophthalmos in sheep and goats. 3,14,15 More commonly, these parasites are known to cause central nervous system cysts (Coenurus cerebralis) in sheep, goats, cattle, and humans. While current literature states that retrobulbar abscesses are a cause of exophthalmos in goats, no individual detailed case reports have been found.…”