Cases reported "Optic Nerve Diseases"

Filter by keywords:



Filtering documents. Please wait...

11/15. Hemorrhagic complications of optic nerve drusen.

    We found hemorrhages in 13 eyes of 57 patients with optic disk drusen. In seven eyes, the hemorrhages originated in peripapillary choroidal neovascular membranes. In the other six eyes, no neovascular membrane was present. Hemorrhages that occurred in the absence of choroidal new vessels caused no visual symptoms in any patient. All resolved without sequelae. Hemorrhages originating in choroidal neovascular membranes commonly caused visual symptoms; however, six of seven eyes retained visual acuities of 6/12 (20/40) or better without any therapy. Thus, despite potential submacular hemorrhage, we do not recommend routine photocoagulation for peripapillary choroidal neovascular membranes secondary to optic disk drusen.
- - - - - - - - - -
ranking = 1
keywords = membrane
(Clic here for more details about this article)

12/15. Von Recklinghausen's disease with a malignant meningeal, cerebral and optic nerve tumour and bilateral vagal schwannomas. Possible mesenchymal histogenesis on light and electron microscopy.

    The clinical, histopathologic and fine structural features of multiple unusual tumours detected in a 20-year-old patient with von Recklinghausen's disease, who died within a year of onset of symptoms of a rapidly expanding intracranial tumour, are described. The tumour was found to involve the falx cerebri, the basal leptomeninges and dura mater, both olfactory and optic nerves, both frontal lobes, the right temporal lobe and middle cerebral peduncle, both middle cerebellar peduncles, and with a metastasis in a cervical node. On light and electron microscopy this tumour appeared to be a fibroblastic meningeal sarcoma with giant cells, mitotic figures, a rich reticulin matrix throughout, and tumour cells full of rough ER but without any glial filaments. Also very unusual was the involvement of both vagus nerves in their cervical and intrathoracic portions, by a schwannomatous benign tumour and with a non-chromaffin paraganglioma at its termination in the oesophagus. One of the few cutaneous "neurofibromas" was also schwannian, containing tumour cells with a basement membrane on electron microscopy. Most, if not all, of these tumours appeared mesenchymal in origin, more aggressive in behaviour and carrying a graver prognosis in von Recklinghausen's disease.
- - - - - - - - - -
ranking = 0.25
keywords = membrane
(Clic here for more details about this article)

13/15. Visual field loss following vitreous surgery.

    OBJECTIVE: To assess possible causes of visual field loss following vitreous surgery. DESIGN: charts of 8 patients prospectively identified, who developed visual field loss following vitreous surgery, were reviewed to characterize this newly recognized syndrome and assess possible causes. RESULTS: Two patients had preexisting chronic open-angle glaucoma and 1 had ocular hypertension. Indications for surgery included 4 eyes with macular holes, 1 eye with epiretinal membrane, 2 eyes with rhegmatogenous retinal detachment, and 1 eye with retinal detachment and giant retinal tear. All patients received retrobulbar anesthesia. Seven of 8 patients had fluid/gas exchange with installation of long-acting bubbles. In 1 patient with a macular hole, a small hemorrhage was noted along a vessel coming off the nerve superotemporally while attempting to engage the posterior cortical vitreous intraoperatively. This patient developed an inferior visual field defect. No intraocular pressure (IOP) measurements greater than 26 mm Hg were recorded in any eye perioperatively. Visual field defects included 4 eyes with inferotemporal defects, 2 eyes with inferior altitudinal defects, 1 eye with a cecocentral scotoma, and 1 eye with a superonasal defect. Only 1 patient had worsened visual acuity. A relative afferent pupillary defect was observed in 4 eyes and disc pallor in 5 eyes. CONCLUSIONS: Central or peripheral visual field loss can now be recognized as a possible complication of vitreous surgery. In some cases, a relative afferent pupillary defect and optic disc pallor are present, suggesting that the optic nerve is the site of injury. Possible mechanisms include ischemia due to elevated IOP or fluctuations in IOP, optic nerve damage from retrobulbar injection, direct intraoperative mechanical trauma to the optic nerve, indirect injury from vigorous suction near the optic nerve leading to shearing of peripapillary axons or vessels, or a combination of these. Certain optic nerves may be more susceptible to injury because of preexisting compromise from glaucoma or vascular disease.
- - - - - - - - - -
ranking = 338.38613494409
keywords = epiretinal membrane, epiretinal, membrane
(Clic here for more details about this article)

14/15. Choroidal neovascular membrane associated with optic nerve head drusen in a child.

    PURPOSE: To illustrate the diagnosis, evaluation, and complications of pseudopapilledema in children. methods: We examined a 9-year-old boy who had suspected papilledema and a retinal mass. He had undergone neuroradiologic imaging at an outside facility. RESULTS: Clinical examination of the patient provided the diagnosis of optic nerve head drusen, pseudopapilledema, and a cicatrized choroidal neovascular membrane. Examination of the boy's parents disclosed optic nerve head drusen in the father. CONCLUSIONS: Choroidal neovascular membranes caused by optic nerve head drusen are uncommon in children. Clinical examination of the patient and family members, along with B-scan ultrasonography, can establish this cause. Neuroradiologic testing is unnecessary, and carries risk related to the need for sedation.
- - - - - - - - - -
ranking = 1.5
keywords = membrane
(Clic here for more details about this article)

15/15. Proliferative diabetic retinopathy with a proliferative membrane that spread anteriorly from the optic disc.

    The authors report a case of proliferative diabetic retinopathy in which the proliferating membrane spread from the optic disc to the anterior of the eyeball, and did not appear to involve the posterior precortical vitreous pocket.
- - - - - - - - - -
ranking = 1.25
keywords = membrane
(Clic here for more details about this article)
<- Previous |


Leave a message about 'Optic Nerve Diseases'


We do not evaluate or guarantee the accuracy of any content in this site. Click here for the full disclaimer.