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The first 25 slides, exactly as they appear. The full deck has 48 content slides.
Ophthalmology
Tumors of Optic Nerve
Built from Khurana — Neuro-Ophthalmology
What’s inside
6 sections · 48 slides
Overview
- What you will learn in this deck
What optic nerve tumors are
- The core idea in plain terms
- The two families of optic nerve tumor
- Two tumors dominate the whole subject
- Glioma has two utterly different faces
Benign optic nerve glioma
- Who gets it, and the neurofibromatosis link
- Fusiform optic nerve enlarged by a glioma
- How it shows itself: proptosis and pain
- What the eye examination reveals
- Compressive optic neuropathy and its knock-on effects
- Why spread to the chiasm changes everything
- CT of a fusiform intraorbital optic nerve mass
- Imaging: reading a glioma on MRI and CT
- The glioma's MRI signal signature
- Treatment principle one: often, just watch
- When to intervene, and how
The dangerous variants
- Malignant optic nerve glioma: rare but lethal
- How the malignant glioma presents
- Telling it apart, and its grim outcome
- Treatment of the malignant glioma, and ganglioglioma
Optic nerve sheath meningioma
- What ONSM is, and how common
- Where ONSM comes from: primary versus secondary
- The childhood form is more aggressive
- How ONSM steals vision
- Fundus signs and the classic triad
- Proptosis and hyperostosis
- Diagnosis one: ultrasound and the 30-degree test
- CT of a mass thickening the optic nerve sheath
- Diagnosis two: CT and the tram-track sign
- Diagnosis three: MRI, the procedure of choice
- Meningothelial cells in lobules and whorls
- Histopathology: two patterns
- Natural history: slow, one-eyed, not fatal
- Treating ONSM: watch or irradiate
- Why surgery has almost no role, and drugs none
Rarer tumors and the big picture
- The other, rare optic nerve tumors
- Optic nerve tumors at a glance
- How the diagnosis is actually reached
- A young girl has slow one-sided proptosis and an afferent pupillary defect. What is the likely tumor, and how is it managed?
- References (1/2)
- References (2/2)
- Neuro-Ophthalmology