♠The purpose of our educational exhibit is to:
Review key anatomical structures,
pathologic mechanism and clinical implication of papilledema
Describe the key MRI findings of papilledema
Review several causes of increased intracranial pressure and papilledema,
with some cases.
Emphasize the role of transverse venous sinus stenting in patients with idiopathic intracranial hypertension and transverse sinus stenosis.
1. Definition of papilledema
Optic disc swelling associated with increased intracranial pressure (ICP)
Fundoscopic findings of papilledema (Fig.1)
Optic disc swelling with blurred margin
Key anatomic structures associated with papilledema
- Envelope the length of the optic nerve up to the globe and continuous with intracranial meninges
Subarachnoid space of the optic nerve
Findings and procedure details
♠ Key MR imaging findings of papilledema
Widening of optic nerve sheath
Normal optic nerve sheath
Just behind the globe: 5.52 ± 1.11 mm
4 mm posterior to the globe : 5.2 ± 0.9 mm
Bulbous appearance at just behind the globe
- Most distensible part of the optic nerve sheath
Diameter of optic nerve sheath is a strong indicator of increased ICP
Optic nerve sheath enlargement in papilledema (Fig.4,
- Appears as...
Papilledema is optic disc swelling associated with intracranial pressure (ICP)
Early detection of papilledema is important because it could be indicator of increased ICP and could lead to visual impairment and even blindness by itself
There are some key MRI findings which represent the papilledema
1) Widening of optic nerve sheath
2) Flattening of posterior sclera
3) Optic disc protrusion into globe
4) Tortuosity of optic nerves
There are some...
MR imaging of papilledema and visual pathways: effects of increased intracranial pressure and pathophysiologic mechanisms.
AJNR Am J Neuroradiol 2013;34:919-924
Pseudotumor cerebri: brief review of clinical syndrome and imaging findings.
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Transverse sinus stenting for idiopathic intracranial...