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Idiopathic Optic Nerve Glioma: A Case Report.
Cureus
December 2024
Department of Ophthalmology, Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pune, IND.
Optic nerve gliomas are tumors that develop along the optic nerve pathway, most often classified as pilocytic astrocytomas. These growths are typically benign, especially in young children between the ages of one and six years, while the rarer malignant types are generally more aggressive and tend to appear in adults. Characteristically slow-growing, optic nerve gliomas are commonly located in the pre-chiasmal part of the optic nerve but can extend to post-chiasmal regions and into the brain if left untreated.
View Article and Find Full Text PDFStructural and vascular assessment of the optic nerve head and macula in chronic Chagas disease.
Sci Rep
January 2025
Department of Ophthalmology, Federal University of São Paulo, São Paulo, SP, Brazil.
Chagas disease (CD), a parasitic infection, may have ocular repercussions in its cardiologic form, since a history of heart disease of other etiologies already has been established as a risk factor for neuropathies and maculopathies. The aim of the present study was to investigate preclinical structural and vascular optic nerve head (ONH) and macular parameters in patients with chronic CD. Nineteen patients with CD and 19 healthy subjects were evaluated with optical coherence tomography, optical coherence tomography angiography, and Laguna ONhE® software.
View Article and Find Full Text PDFAnesthetic Management of a Patient With Arnold Chiari Malformation and Syringomyelia During Laparoscopic Surgery With Neurologic Monitoring: A Case Report.
A A Pract
January 2025
Département d'Anesthésie, Hôpital Antoine Béclère, APHP.Université Paris-Saclay, Clamart, France.
We describe a patient with severe Arnold Chiari Malformation and syringomyelia who underwent gynecological laparoscopy in an emergency context; no brain imaging was available. We here report the successful use of optic nerve sheath diameter (ONSD) and middle cerebral artery (MCA) velocity measurements as surrogate monitoring for cerebral blood flow and intracranial pressure, respectively. MCA velocity was low when assessed after peritoneal insufflation and ONSD increased to 6.
View Article and Find Full Text PDFRetinal capillary density among healthy Egyptian and South Asian students: an optical coherence tomography angiography study.
Int J Ophthalmol
January 2025
Department of Ophthalmology, Kasr ElAini Hospital, Cairo University, Cairo 1141, Egypt.
Aim: To compare the macular and optic nerve perfusion and vascular architecture using optical coherence tomography angiography (OCTA) in normal eyes of Egyptian (Caucasians) and South Asian (Asians) volunteers.
Methods: Cross-sectional analytical OCTA study performed on 90 eyes of South Asian (=45) and Egyptians (=45) were analyzed. All participants underwent best-corrected visual acuity test, slit lamp, and fundus examination.
Glaucomatous retinal ganglion cells: death and protection.
Int J Ophthalmol
January 2025
Department of Ophthalmology, the Second Affiliated Hospital of Xi'an Medical University, Xi'an 710038, Shaanxi Province, China.
Glaucoma is a group of diseases characterized by progressive optic nerve degeneration, with the characteristic pathological change being death of retinal ganglion cells (RGCs), which ultimately causes visual field loss and irreversible blindness. Elevated intraocular pressure (IOP) remains the most important risk factor for glaucoma, but the exact mechanism responsible for the death of RGCs is currently unknown. Neurotrophic factor deficiency, impaired mitochondrial structure and function, disrupted axonal transport, disturbed Ca homeostasis, and activation of apoptotic and autophagic pathways play important roles in RGC death in glaucoma.
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