purpose : to report a rare case of large vascularized astrocytoma on optic disc. case report : a 12-year-old boy with history of decreased vision in the left eye since 5-6 months ago was referred to the ocular oncology service at rassoul akram hospital with provisional diagnosis of retinoblastoma. on examination, visual acuity was counting fingers at 50 cm, and a 3+ relative afferent pupillary ...

purpose : to evaluate orbital blood flow velocities and optic nerve diameter with doppler and gray-scale sonography in patients with acute unilateral optic neuritis (on) methods : orbital doppler and gray-scale sonography was performed in 46 eyes of 23 patients aged 19-47 with acute unilateral on. on was diagnosed by an ophthalmologist on the basis of clinical presentation, presence of decrease...

objective the diagnosis of de morsier syndrome or septo-optic dysplasia is made on the basis of the diagnosis of optic nerve hypoplasia. septo-optic dysplasia is defined by a variable combination of dysgenesis of midline brain structures including optic nerve hypoplasia and hypothalamic-pituitary dysfunction often associated with a wide variety of brain malformations of cortical development. th...

Cranial computed tomographic scans of 225 patients with orbital mass lesions were reviewed. In 11 patients, the optic nerve was seen as a linear defect through the orbital mass. These 11 cases comprised three optic nerve sheath meningiomas, three hemangiomas, two cases of pseudotumor, and one case each of Erdheim-Chester disease, optic neuritis, and metastatic disease. Optic nerve sheath mening...

the case under consideration was a glioma of the optic nerve, one of the rarer tumors. microscopically it was diagnosed as a oligodendrocytoma. the patient, whose disease bage before the age of puberty, complain.ed of poor vision which in the course of five yars resulted in blindne

A 14-year-old who had 7episodes of relapsing unita­leral paralysis of facial nerve during 7 year-;. was admit­ted to the hospital. The X-Ray revealed Osteopetrosis, and the bone biopsy was proved this diagnosis. But there was not any bone fracture, or anemia. Pressure over fa­cial nerve caused by condensation of entire facial nerve canal. was detected by tomographia. Probablv intermitant facial...

A 32-year-old woman who died suddenly during pregnancy as a result of an adrenal phaeochromocytoma also suffered from von Recklinghausen's disease. 21 years earlier she had an optic nerve glioma successfully removed. The association between von Reckinghausen's disease and optic nerve glioma/phaeochromocytoma is well established. So far as is known, the present case is the first ever published w...

Aims. The objective of this paper is to determine the incidence of ophthalmic disease potentially leading to optic nerve disease in Middle Tennessee. Methods. We use a retrospective population-based incidence study design focusing on the population of middle Tennessee and its nearby suburbs (N=3 397 515). The electronic medical records for all patients evaluated or treated at a large tertiary c...

background sphenoid sinus is surrounded by many vital vascular and nervous structures. in more than 20% of patients with chronic sinusitis, involvement of sphenoid sinus has been observed. besides, sphenoid sinus is an appropriate route to access anterior and middle cranial fossa in surgery. therefore, it is important to have an adequate knowledge about the contents of sphenoid sinus and its pr...