Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2014 Apr;2(1):43-7.
doi: 10.14791/btrt.2014.2.1.43. Epub 2014 Apr 29.

Oculomotor nerve schwannoma: a case report

Yong-Hwan Cho  1 , Kyung-Su Sung  1 , Young-Jin Song  1 , Dae-Cheol Kim  2 , Sunseob Choi  3 , Ki-Uk Kim  1
Affiliations

Oculomotor nerve schwannoma: a case report

Yong-Hwan Cho et al. Brain Tumor Res Treat. 2014 Apr.

Abstract

Schwannomas account for about 8% of intracranial tumors and 90% are vestibular schwannomas. Oculomotor schwannoma without neurofibromatosis is extremely rare. A 41-year-old female presented with complaints of blurred vision, and the neurologic examination revealed afferent pupillary defect and decreased visual acuity of the left side. Brain magnetic resonance image showed an extra axial mass in the left superior orbital fissure. The patient underwent major surgery via the fronto-temporal approach. The tumor originated from the oculomotor nerve and was subtotally removed under microscopic surgery. The pathological findings confirmed the tumor as a schwannoma. After surgery, ptosis and medial gaze limitation of the left eye was detected, but the symptoms improved gradually.

Keywords: Oculomotor nerve; Schwannoma; Surgery.

PubMed Disclaimer

Conflict of interest statement

The authors have no financial conflicts of interest.

Figures

Fig. 1
Fig. 1
A T1-weighted magnetic resonance imaging (MRI) with gadolinium enhancement is showing an avoid mass in the superior orbital fissure, and the mass was extended from cavernous sinus to the intraorbital resion (A-C). There is no evidence of re-growth on one year-following MRI (D-F).
Fig. 2
Fig. 2
Intaoperative photogram showing the tumor originated from ventral part of oculomotor nerve. V1: ophthalmic branch of trigeminal nerve, III: oculomotor nerve, II: optic nerve, arrows: the tumor.
Fig. 3
Fig. 3
The tumor showed whorling or wavy pattern of elongated spindle cells with nuclear palisading, alternating cellular and loose areas (H&E, ×200).
Fig. 4
Fig. 4
Photograph demonstrating post-surgical function of oculomotor nerve. A: There were medial and down gaze limitation and ptosis of left eye. B: The nerve function was improved after four months.
See this image and copyright information in PMC

References

    1. Choi YS, Sung KS, Song YJ, Kim HD. Olfactory schwannoma-case report- J Korean Neurosurg Soc. 2009;45:103–106. - PMC - PubMed
    1. Ohata K, Takami T, Goto T, Ishibashi K. Schwannoma of the oculomotor nerve. Neurol India. 2006;54:437–439. - PubMed
    1. Netuka D, Benes V. Oculomotor nerve schwannoma. Br J Neurosurg. 2003;17:168–173. - PubMed
    1. Asaoka K, Sawamura Y, Murai H, Satoh M. Schwannoma of the oculomotor nerve: a case report with consideration of the surgical treatment. Neurosurgery. 1999;45:630–633. discussion 633-4. - PubMed
    1. Katoh M, Kawamoto T, Ohnishi K, Sawamura Y, Abe H. Asymptomatic schwannoma of the oculomotor nerve: case report. J Clin Neurosci. 2000;7:458–460. - PubMed