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OtherHEAD AND NECK

Intracanalicular Optic Nerve Meningioma: A Serious Diagnostic Pitfall

Alan Jackson, Tufail Patankar and Roger D. Laitt
American Journal of Neuroradiology June 2003, 24 (6) 1167-1170;
Alan Jackson
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Tufail Patankar
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Roger D. Laitt
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    Fig 1.

    Case 2.

    A, CT image from case 2, showing a small soft tissue mass at the apex of the right orbit (arrow). This image is a prediagnostic scan obtained before the patient’s referral to our center. The nerve enlargement is subtle and is difficult to appreciate because of the relatively thick sections. This abnormality was identified only on retrospective review.

    B, T1-weighted MR image, reconstructed along the optic pathways, showing slight widening of the soft tissue of the optic nerve–optic nerve sheath complex at the orbital apex. The abnormality is still subtle and could easily be overlooked.

    C, Coronal T1-weighted MR image also showing subtle increase in the size of the soft tissue signal intensity within the right optic canal.

    D, Postcontrast T1-weighted MR image, reconstructed along the optic pathways, showing enhancement surrounding the optic nerve within the optic canal (large arrows). There is en-plaque growth along the walls of the sulcus chiasmaticus, giving a “rose thorn” appearance (small arrows).

  • Fig 2.
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    Fig 2.

    Case 3.

    A, T2-weighted coronal MR image, showing dilatation of the left optic nerve sheath.

    B, Heavily T2-weighted image with fat and water suppression (SPIR/FLAIR), showing increased T2 signal intensity and atrophy of the optic nerve.

    C, Coronal images through the sulcus chiasmaticus, demonstrating a small tumor nodule arising from the cranial end of the left optic canal (arrow).

    D, Coronal image from a contrast-enhanced T1-weighted volume-rendered MR image, acquired with fat suppression through the optic nerve in the midorbit, showing en-plaque growth of tumor within the left optic nerve sheath (arrow).

    E, Axial oblique reconstruction from a contrast-enhanced T1-weighted volume-rendered MR image, acquired with fat suppression along the optic canals, showing the extent of the tumor. Note the optic nerve emerging from the tumor anteriorly and the en-plaque growth of tumor along the anterior optic nerve sheath.

    F, Sagittal oblique reconstruction from a contrast-enhanced T1-weighted volume-rendered MR image, acquired with fat suppression along the course of the left optic canal, showing the extent of the tumor. Note the tram track sign due to the central nonenhancing optic nerve, the mural nodule (large white arrow) arising behind the roof of the optic canal (black arrows), and the en-plaque growth of the tumor along the anterior part of the orbital optic nerve sheath (small white arrow).

Tables

  • Figures
  • Clinical Data for Patients with Cannalicular Optic Nerve Meningloma

    PatientAge at Presentation (years)Time to Diagnosis (months)Surgical OutcomeOutcome
    12449No surgeryBlind
    22822CRVision preserved
    32832PRComplete loss of vision in right eye
    43321PRLight perception in left eye only
    53612CRVision preserved
    63814CRVision preserved
    • Note.—CR, complete resection; PR, partial resection.

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American Journal of Neuroradiology: 24 (6)
American Journal of Neuroradiology
Vol. 24, Issue 6
1 Jun 2003
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Intracanalicular Optic Nerve Meningioma: A Serious Diagnostic Pitfall
Alan Jackson, Tufail Patankar, Roger D. Laitt
American Journal of Neuroradiology Jun 2003, 24 (6) 1167-1170;

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Intracanalicular Optic Nerve Meningioma: A Serious Diagnostic Pitfall
Alan Jackson, Tufail Patankar, Roger D. Laitt
American Journal of Neuroradiology Jun 2003, 24 (6) 1167-1170;
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