A retrobulbar dermoid cyst with involvement of the sinus in an 18‐year old pony

Abstract

Summary This case report describes a retrobulbar dermoid cyst in an 18‐year‐old pony with an invasive character into the frontal sinus. CT imaging was important for the appropriate management of this case and the definitive diagnosis was obtained from histopathology. Surgical excision was performed successfully without recurrence 1‐year post‐operatively. The pony returned to its intended use and previous performance level, although complaints of mild symptoms of headshaking were noted in bright light only.

Pharyngeal dermoid cyst causing partial upper airway obstruction in a cat

“…Although there are only a few reports regarding the appearance of dermoid cysts on CT and MRI, there are remarkable differences to nasopharyngeal polyps. 9,[18][19][20][21][22] In one report of a dermoid cyst, including CT imaging findings, a cystic structure with mixed attenuation and a hypoattenuating centre was noted, 20 which is comparable to the findings in our patient. In a study of 13 cats with nasopharyngeal polyps that underwent a CT examination, all masses were hypo attenuating to the adjacent musculature and isoattenuating to soft tissue.…”

Diagnosis and arthroscopic removal of an intra‐articular epidermoid cyst in the distal interphalangeal joint of a 15‐year‐old horse

“…Epidermoid cysts have been described in the false nostril and were called nasal atheroma (Tremaine et al, 1999). Sporadic case reports have identified epidermoid cysts in a variety of other locations: intracranially (Peters et al, 2003), in the frontal bones (Gunnarsdottir et al, 2014), retrobulbar area (Muñoz et al, 2007; Visser et al, 2019), pelvic flexure wall (Brünott et al, 2007), mandible (Camus et al, 1996), third phalanx (Fraser et al, 2006; Headly et al, 2009), digital flexor tendon sheath (DFTS) (Joostens et al, 2019; Sanz et al, 2006) and foot (Mageed & Elfadl, 2020). Epidermoid cysts can be congenital or traumatic in origin (Ettinger & Manderson, 1973).…”

Dermoid cysts formation is a complication of wound pinch grafting in a horse: A case report

“…However, the space‐occupying effect and pressure on adjacent structures may lead to clinical symptoms. In horses, reported manifestations reflect locational and include neurological signs, exophthalmos, and recurrent colic 8–10,22 . In small animals, clinical symptoms are commonly associated with cysts located in the central nervous system 23 .…”

“…In a more recent case report, another retrobulbar cyst with sinus involvement was also conjectured to have an acquired etiology in an 18 year old pony. Notably, this case lacked any reported history of trauma or surgical manipulation 10 …”