Trochlear nerve schwannoma with intratumoral hemorrhage

Case report

Shigeo Oba, Tomoru Miwa, Takeshi Kawase

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

OBJECTIVE AND IMPORTANCE: Schwannomas originating from the trochlear nerve without neurofibromatosis are extremely rare. Thirty-four cases have previously been reported in the literature, and only 25 cases were pathologically diagnosed. In addition, intratumoral hemorrhage in intracranial schwannomas is also rare. Approximately 30 cases of intracranial schwannomas with intratumoral hemorrhage have been reported. CLINICAL PRESENTATION: A 42-year-old man presented with left hemiparesis and right trochlear nerve palsy. Magnetic resonance imaging revealed an abnormal cystic lesion beside the brainstem. His symptoms rapidly worsened after enlargement of the mass because of intratumoral hemorrhage. INTERVENTION: Gross total removal of the tumor was performed via the anterior transpetrosal approach. The tip of the trochlear nerve was fanned out and unified with the tumor. The tumor was diagnosed as a schwannoma. CONCLUSION: The patient's hemiparesis improved postoperatively, and he was discharged 1 week after the operation. Magnetic resonance imaging performed 4 months later revealed no regrowth of the tumor. Only right trochlear nerve palsy has persisted. This report is the second case of intratumoral hemorrhage from a trochlear nerve schwannoma.

Original languageEnglish
JournalNeurosurgery
Volume58
Issue number4
DOIs
Publication statusPublished - 01-04-2006

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Trochlear Nerve
Neurilemmoma
Hemorrhage
Trochlear Nerve Diseases
Paresis
Neoplasms
Magnetic Resonance Imaging
Neurofibromatoses
Intracranial Hemorrhages
Brain Stem

All Science Journal Classification (ASJC) codes

  • Surgery
  • Clinical Neurology

Cite this

Oba, Shigeo ; Miwa, Tomoru ; Kawase, Takeshi. / Trochlear nerve schwannoma with intratumoral hemorrhage : Case report. In: Neurosurgery. 2006 ; Vol. 58, No. 4.
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Trochlear nerve schwannoma with intratumoral hemorrhage : Case report. / Oba, Shigeo; Miwa, Tomoru; Kawase, Takeshi.

In: Neurosurgery, Vol. 58, No. 4, 01.04.2006.

Research output: Contribution to journalArticle

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