Internal auditory canal cisternography: report of 27 cases

Abstract

Small acoustic neuromas, especially when located within the internal auditory canal (IAC), are difficult to be detected by ordinary X-ray methods. We prefer using small dose Myodil IAC cisternography, with which small acoustic neuromas can be satisfactorily visualized. 27 cases have been examined with this method, of which 13 cases were diagnosed as acoustic neuromas roentgenologically, and 7 of 13 were proved by surgery, 3 of which were small acoustic neuromas and the smallest one had a diameter of only l cm. Beside these, there were 2 cases of cerebellopontine angle meningioma and l case of M ventricle ependymoma.

For examination we adopt lateral recumbent position with the suspected tumor side downward, and X-ray film is taken in A-P projection. The manipulation is simple and the pathological changes can be shown satisfactorily.

Keywords

internal auditory canal cisternography / small acoustic neuroma / cerebellopontine angle

References

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