PMC6258518_01
Case 1 at presentation: hyperaemic, swollen and protrusion of the nictitating membrane, conjunctival chemosis, exophthalmos, periocular and periorbital swelling, left eye.
OpenVetJ-8-445-g001.jpg
PMC6258518_01_OpenVetJ-8-445-g001.jpg
F1
The patient presented with peracute severe left periocular and facial swelling, dysorexia and lethargy (Fig. 1).
Case 1 at presentation. (A): US parasagittal oblique image. (B and C): CT-scan dorsal and parasagittal reformatted post contrast images of the head, soft tissue window: conical shape of the left eye ("globe tenting") secondary to compression from a cavitary lesion containing septea surrounded by a not well circumscribed enhancing wall (arrows and arrowheads) with exophthalmos.
OpenVetJ-8-445-g002.jpg
PMC6258518_01_OpenVetJ-8-445-g002.jpg
F2
Compression of the globe caused by the orbital mass was associated with marked globe tenting, identified as a conical deformation of the posterior wall of the globe (Fig. 2A). Pre and post contrast CT scans (Siemens Somatom 16-Slices, Germany) of the head were performed under general anaesthesia (midazolam 0.25mg/kg and methadone 0.2mg/kg premedication, propofol 2mg/kg induction and isoflurane +-2% maintenance), to further evaluate the origin and extension of the orbital mass, and to rule out a foreign body (Fig. 2B-C).
Case 1: Three weeks after presentation, CT-scan dorsal reformatted post contrast images of the head, soft tissue window: globe shape returned to normal, almost complete resolution of the cavitary lesion with mild contrast enhancement of the left retro-orbital soft tissue (arrowheads). Arrows indicate the optic nerves. A mild enlargement on the left side can be appreciated (4 mm versus 3.4 mm on the right side).
OpenVetJ-8-445-g003.jpg
PMC6258518_01_OpenVetJ-8-445-g003.jpg
F3
Case 1: (A): fundus left eye three weeks after presentation: peripheral focal striping, as result of previous indentation. Normal vessels. (B): fundus left eye two months after presentation: mild sign of optic disk atrophy. Normal vessels. (C and D): left optic disk three weeks (C) and two months (D) after presentation: optic disk atrophy progression.
OpenVetJ-8-445-g004.jpg
PMC6258518_01_OpenVetJ-8-445-g004.jpg
F4
PMC6258518_02
Case 2 at presentation: hyperaemic, swollen and protrusion of the nictitating membrane, chemosis, exophthalmos, periocular and periorbital swelling, left eye.
OpenVetJ-8-445-g005.jpg
PMC6258518_02_OpenVetJ-8-445-g005.jpg
F5
Ophthalmic examination showed severe dorsolateral exophthalmos with absence of globe retropulsion, severely swollen and warm eyelids, as well as a large left-sided facial swelling (Fig. 5).
Case 2, fundus 4 months after presentation. (a): right eye appears normal. (b): Left eye has a mildly attenuated vascular pattern and optic disk atrophy.
OpenVetJ-8-445-g006.jpg
PMC6258518_02_OpenVetJ-8-445-g006.jpg
F6
Smartscope Vet2, Finland) of both eyes were taken at 4 months. Severe atrophy of the left ON head as well as mild retinal vascular attenuation were seen (Fig. 6).