Hemorrahge and abnormal veins in acoustic neurinoma: MR findings

K. Ishii, S. Takahashi, K. Matsumoto, T. Ishibashi, K. Sakamoto, S. Hashimoto, R. Katakura, A. Ogawa, R. Yuasa

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


We reviewed the MR imaging findings of 57 acoustic neurinomas which were verified at surgery or diagnosed on the basis of neuroradiological and neurootological data. Two uncommon MR findings of acoustic neurinoma were found. First, hypointense areas were observed on T2-weighted images in five of the 12 tumors larger than 25 mm in diameter. These hypointense areas represented hemosiderin deposition secondary to occult intratumoral hemorrhage. Second, curvilinear or round signal voids were noted at the periphery of 11 large or medium-sized tumors, and these corresponded to 'abnormal veins' seen on angiographic studies.

Original languageEnglish
Pages (from-to)65-69
Number of pages5
JournalRadiation Medicine - Medical Imaging and Radiation Oncology
Issue number2
Publication statusPublished - 1996
Externally publishedYes


  • MRI
  • MRI
  • acoustic neurinoma
  • acoustic neurinoma
  • cerebellopontine angle
  • hemorrhage

ASJC Scopus subject areas

  • Radiation
  • Radiology Nuclear Medicine and imaging
  • Oncology


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