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RADIOLOGISTS REPORT

The main significant abnormality being there appeared to be a cystic area seen in the vicinity of the left cerebral hemisphere. This is best demonstrated on the coronal cuts. One can identify the falx, the lateral ventricles and the third ventricles and they are not dilated. The internal capsule and thalami are all well identified and are normal. Further high up and posteriorly near the vicinity of the parietal and occipital area, one comes into an area of cystic change with multiple membranes present. This is not causing any significant mass effect. In some areas, it appears there is some debris floating within this cystic mass. I do not think this is communicating with the lateral ventricle. The overlying skull table appeared to be intact. There is no evidence of any encephalocele or menigomyelocele demonstrated. No other abnormality is seen.

OPINION: The main significant abnormality being there is a cystic mass which is seen occupying the cerebral hemisphere. I think this is present on the left. This is associated with some cystic component. Some of the cerebral mantle is missing. I have the feeling that probably one is dealing with cystic degenerative change, probably related to, porencephaly, the etiology of which cannot be established on this examination. One may postulate that there may have been a vascular insult affecting the middle cerebral artery on the left, but time has not allowed the lateral ventricles to expand suggesting this may be a recent insult. The other differential diagnosis to consider would be an arachnoid cyst. The absence of hydrocephalus makes Dandy-Walker cyst unlikely. Repeat examination for further follow-up is recommended.

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