sb/hs/nl/nl
Date : 00.00.00
Name of the Patient : Abc Xyzhanlmn / M / 45 yrs.
Referred by : Dr. Abc Xyzrani.
Examination : M.R.I. of the Brain.
CLINICAL PROFILE :
H/O surgery for right frontal oligoastrocytoma in July 0000. Has received 40 sittings of radiotherapy.
For follow-up.
EXAMINATION :
M.R.I of the brain was performed using the following parameters :
5 mm thick T1 Weighted, proton and T2 Weighted axial images.
5 mm thick FLAIR coronal images.
5 mm thick T1 Weighted sagittal images.
After administration of contrast the following parameters were used :
5 mm thick T1 Weighted axial and coronal images with magnetization transfer.
5 mm thick T1 Weighted sagittal images.
5 mm thick Fast Scan (T2 *) coronal images.
OBSERVATION :
There is evidence of a right fronto-parietal craniectomy.
There is seen a fairly large, heterogeneous signal intensity mass lesion in the right frontal lobe. This lesion appears predominantly hypointense on the T1 Weighted images and appears hyperintense on the T2 Weighted images. Diffuse areas which are hyperintense on the T1 Weighted images and hypointense on the T2 Weighted images are also noted within this lesion. Focal,
hypointense signal on all the pulse sequences are also noted within this lesion which may correspond to the calcific foci seen on the CT scan images. There is also a diffuse, hyperintense signal on the proton, T2 Weighted and Flair images in the adjacent white matter which may represent perilesional edema/ tumor infiltration/post-operative/post-radiotherapy changes.
There is resultant effacement of the cerebral cortical sulci in the right frontal region with mild indentation and inferior displacement of the frontal horn of the right lateral ventricle.
Subtle hyperintense signal on the T2 Weighted and Flair images is noted in the left frontal deep white matter.
There is mild dilatation of the frontal horns of both the lateral ventricles.
The third and the fourth ventricles are normal. The basal cisternal spaces are unremarkable. There is no shift of the midline structures. No obvious vascular anomaly is identified on this study.
After administration of contrast, there is patchy enhancement of the previously described lesion in the right frontal lobe. Meningeal enhancement is noted at the operative site.
Inflammatory changes are noted in the right maxillary antrum and mastoid air cells bilaterally.
IMPRESSION :
1. Post-operative/post-radiotherapy status.
2. Heterogeneous, patchily enhancing mass lesion in the right frontal region most likely represents a residual oligo-astrocytoma.
As compared to the previous CT Scan 00.00.00, there is reduction in the degree of mass effect on the present study.