Clinical signs of retrobulbar
neoplasm were not present in this case, but of a multifocal neurological lesion involving intracranial structures.
Filling the right infraorbital sinus and extending into the right retrobulbar
space, a ~2.5-cm-diameter, minimally heterogeneous, soft tissue-attenuating (pre-HU 30-76), and mildly peripherally contrast-enhancing (post-HU 28-102) mass is present, consistent with keratin cyst (a).
Atrophy of the retrobulbar
fat leading to enophthalmos is common, [7,11,12] other potential orbital abnormalities include uveitis and retinal or optic nerve alterations.
Direct compression and impairment of blood supply to the nerves have been proposed as the possible mechanisms. In case of retrobulbar
hemorrhage, the globe is displaced anteriorly to the extent allowable by the canthal tendons (and to a lesser degree, the prolapse of bulbar fat).
(13) reported that caffeine (300 mg) affects retrobulbar
blood flow by increasing the resistive index of the ophthalmic, central retinal, and nasal posterior ciliary arteries.
Orbital computed tomography and magnetic resonance imaging scans showed an extra-axial, well-defined, 30x30x45-mm mass located in the middle cranial fossa, next to the temporal pole, with its borders indistinguishable from the leptomeningeal and osseous tissues, associated with sphenoidal bone lysis and invading the retrobulbar
fat tissue (Figure 2).
In the NEON and PORT studies, retrobulbar
followed by peribulbar blocks were the most common.8,9 There has been debate about whether akinetic anaesthesia may improve posterior capsule rupture (PCR) rates.
TSH receptors can not only be found in the thyroid but also in the extraocular eye muscles and retrobulbar
A healthy 69-year-old female presented to the Emergency Department with sudden, painless, visual loss that started immediately following cataract surgery with retrobulbar
anesthesia in the left eye (OS) nine days prior to presentation.
Our report showed an immunocompetent male patient with atypical unilateral painless retrobulbar
neuritis with rapid onset but unresponsive to high-dose steroids.
Ozaki, "Treatment of refractory retrobulbar
granuloma with rituximab in a patient with ANCA-negative Wegener's granulomatosis: a case report," Modern Rheumatology, vol.
In this regard, some color Doppler ultrasonography studies have demonstrated impaired retrobulbar
hemodynamics, reduced retrobulbar
blood flow, and increased resistance to blood flow in both the retinal and choroidal circulation in COPD patients [29-31].