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sb/ke/rg/nl
Date : 00.00.00

Name of the Patient : Abc Xyzhasklmn / F / 48 yrs.
Referred by : Dr. Abc Xyznkaria / Dr. Abc Xyzatil.
Examination : M.R.I. of the Brain.

CLINICAL PROFILE :

C/O right sided headaches with numbness over the right half of the face and tongue since 4-5 months.
Known hypertensive. On Rx.

EXAMINATION :

M.R.I of the brain was performed using the following parameters :

5 mm thick T1 Weighted, proton and T2 Weighted axial images.

3 mm thick T1 Weighted coronal images.

An MR Cisternogram was obtained in the coronal plane.

OBSERVATION :

There is a fairly large, approximately 3.0 x 2.1 x 2.8 cms sized well-defined, extra-axial mass lesion in the right cerebello-pontine angle cistern with its broad base towards the petrous bone. This lesion is of intermediate signal intensity on the T1 Weighted images, appears hyperintense on the proton density images but is only slightly hyperintense to the normal white matter on the T2 Weighted images. There is resultant indentation on the right lateral margin of the pons and the medulla oblongata and minimal effacement of the fourth ventricle. The right seventh and eighth cranial nerve complex is noted along the lateral margin of this lesion. Probable extension of the mass lesion into the right internal auditory canal, proximally, is noted. The root entry zone of the right fifth nerve is indented by this lesion.

There is small bright foci on the proton and T2 Weighted images in the subcortical white matter in the right frontal region and in the left fronto-parietal region which may represent ischemic changes.
..2/.







There is mild fullness of both the lateral ventricles. The third ventricle is normal. The rest of the basal cisternal spaces are unremarkable. There is no shift of the midline structures. No obvious vascular anomaly is identified on this study.

IMPRESSION :

Approximately 3.0 x 2.1 x 2.8 cms sized well-defined, extra-axial
mass lesion in the right cerebello-pontine angle cistern with signal characteristics and extensions as described, most likely represents an acoustic neurinoma.

A contrast enhanced scan would be worthwhile.
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